Author: Embassy Gas

Seeing your boiler pressure climb for no obvious reason can be confusing, particularly when radiators, pipework and ceilings all appear dry. Some pressure movement is normal in a sealed heating system, but repeated spikes towards the red zone should not be ignored. For homeowners in Petersfield and surrounding areas, boiler pressure rising without a leak usually means water is entering the system unexpectedly, or the system can no longer absorb the expansion that occurs as water heats up.

Quick checks you can do now

Before changing any settings, note what the pressure gauge shows when the heating is completely cold. Most sealed systems are commonly set between about 1 and 1.5 bar when cold, although the correct figure depends on the boiler and installation. Check the manufacturer’s instructions if they are available.

Run the heating for around 30 minutes and observe the gauge without removing the boiler casing. These simple observations can give a heating engineer valuable diagnostic information:

• Record the cold pressure: Write down the reading before the heating starts.
• Record the hot pressure: Check it again once the radiators are properly warm.
• Watch how quickly it rises: A slow increase of a few tenths of a bar is generally less concerning than a rapid climb towards 2.5 or 3 bar.
• Check the filling loop: If there is an external braided hose beneath the boiler, confirm that both valves appear fully closed. Do not force stiff valves.
• Look at visible joints: Check radiator valves, exposed pipework and the area below the boiler for moisture, staining or green and white deposits.
• Inspect the outside discharge pipe: Look for dripping from the small copper pipe that normally terminates through an external wall. Do not confuse it with the plastic condensate pipe, which can discharge normally while the boiler runs.

Short checklist:

• Cold and hot readings noted
• Filling loop valves closed
• No water beneath radiators or boiler
• External copper discharge pipe checked
• No repeated topping up carried out

If the gauge reaches approximately 3 bar, water is discharging outside, or the boiler displays a pressure-related fault, switch the heating off and allow it to cool. Avoid repeatedly releasing water from radiators or topping the system up, as this can hide the underlying fault and introduce fresh, oxygenated water that encourages internal corrosion.

What pressure changes are normal?

A sealed central heating system contains a fixed volume of water. As that water heats, it expands. The expansion vessel provides a compressible air or nitrogen cushion that accepts the extra volume and prevents a large pressure increase.

For example, a system sitting near 1.2 bar when cold might rise to around 1.5 or 1.7 bar at normal operating temperature. The precise change varies with the size of the system, its starting pressure, the flow temperature and the expansion vessel capacity. The gauge should then fall towards its original reading as the water cools.

A rise that repeatedly approaches 2.5 to 3 bar is not normal. Nor should the cold pressure creep upwards from one day to the next when no water has deliberately been added. The timing matters: a pressure spike only while the radiators heat points towards a different fault from pressure that increases overnight while the boiler remains off.

Why is boiler pressure rising without a leak?

When there is no visible leak, the pattern usually falls into one of two categories. If pressure rises mainly as the heating warms up and falls significantly after cooling, the expansion vessel is the leading suspect. If pressure continues to increase while the system is cold and inactive, mains water may be passing through a filling valve or, in some combi boilers, through a damaged plate heat exchanger.

The most common possible causes are:

• Loss of expansion vessel charge: The vessel has too little air or nitrogen to accommodate expanding heating water.
• Failed expansion vessel diaphragm: The internal membrane has split, allowing the vessel to fill with water.
• Passing filling loop: A valve that looks closed may still allow higher-pressure mains water into the heating circuit.
• Internal filling valve fault: Boilers with an integral filling arrangement can also pass water when a seal or cartridge is damaged.
• Plate heat exchanger crossover: In a combi boiler, a perforation can allow mains water to enter the lower-pressure heating side.
• Pressure relief valve trouble: A valve that has opened during a spike may continue dripping and cause confusing pressure changes afterwards.

A concealed heating leak would normally make pressure fall rather than rise. However, a leak can coexist with another fault. A homeowner may top up a system because it loses pressure, only for an ineffective expansion vessel to drive the newly added water out through the relief valve during the next heating cycle.

How expansion vessel faults cause pressure spikes

An expansion vessel is divided by a flexible diaphragm. Heating water is on one side and a pressurised gas cushion is on the other. When the water heats and expands, it pushes against the diaphragm and compresses the gas. This keeps system pressure within a controlled range.

Over time, the gas charge can reduce. If the cushion becomes too small, even a modest increase in water volume produces a sharp pressure rise. A typical symptom is a boiler that reads normally when cold but heads towards 3 bar soon after the heating starts. When it cools, the reading may drop unusually low because the pressure relief valve has discharged some water.

A split diaphragm creates a similar pattern, but simply adding gas will not provide a lasting repair. An engineer has to establish whether the vessel can be correctly recharged, whether its connection is restricted, or whether the vessel needs replacement. On some installations, fitting a suitable external expansion vessel is more practical than dismantling much of the boiler to reach the original component.

Testing and recharging must be carried out with the water side correctly depressurised. Pumping air into a vessel while the system remains under water pressure can produce a misleading reading and will not confirm the diaphragm’s condition. Homeowners should therefore avoid removing the boiler casing or pressing the vessel valve, as water and electrical components may be nearby.

Pressure relief valves and other less obvious causes

The pressure relief valve, often shortened to PRV, is a safety component designed to open if system pressure becomes excessive, commonly at around 3 bar. It directs water through a copper discharge pipe to a safe position outside. This can explain why no indoor leak is visible even though the pressure later falls.

Once a PRV has opened, debris can become trapped on its sealing surface. It may then continue to drip after the original pressure problem has been corrected. Repeatedly turning or operating the valve manually is not recommended because doing so can make it leak more persistently. The cause of the high pressure should be diagnosed before the valve is cleaned or replaced.

A filling loop fault produces a different pattern. Mains water is usually at a much higher pressure than the sealed heating circuit, so even a small passing valve can slowly raise the gauge while the boiler is cold. Where local mains pressure is relatively strong, the increase may be more noticeable overnight when water demand is low.

In a combi boiler, a damaged plate heat exchanger can create an internal route between the domestic hot-water supply and central heating circuit. Pressure may rise even with the filling loop isolated. Confirmation requires controlled testing by a competent engineer because isolating valves, appliance components and water supplies must be handled correctly.

Homes around Bordon, Whitehill, Liphook, Alton and Farnham include everything from compact modern systems to extended properties with many radiators. Across GU35, GU34 and GU9, system volume, vessel sizing and previous alterations can all affect how dramatically a fault appears, so readings and operating patterns are more useful than assumptions based on the boiler alone.

How an engineer diagnoses the problem

A structured diagnosis avoids replacing parts unnecessarily. The engineer will normally compare cold and hot pressure, inspect the discharge route and establish whether the rise occurs only during heating or also when the appliance is idle. The system may then be allowed to cool and safely depressurised so the expansion vessel charge can be measured accurately.

If the vessel retains the correct charge and has adequate capacity, attention turns to the filling arrangement and possible mains-water crossover. Isolation tests can show whether pressure stops increasing when a particular water path is closed. The engineer should also inspect the PRV, vessel connection, automatic air vent and pressure sensor, as a restricted connection or inaccurate reading can imitate another fault.

Useful information to provide includes the cold reading, highest hot reading, time taken to rise, whether hot taps were used, and whether water appeared at the outside copper pipe. Photographs of the gauge at different times can help when the fault is intermittent.

Until the cause is confirmed, do not make topping up part of the daily routine. Fresh water dilutes corrosion inhibitor and can accelerate sludge, pinholing and component wear. If pressure stays within the manufacturer’s normal range and the boiler operates correctly, monitoring it briefly is reasonable; repeated movement towards 3 bar, discharge outside or frequent lockouts warrants professional investigation.

Next steps: For safe diagnosis of unexplained boiler pressure changes, contact Embassy Gas on (01420) 558993.

Between 8 and 15 August 2026, there was no single government announcement, product recall or regulatory decision that fundamentally changed how thousands of UK homes must be heated. That may sound like a quiet week, but it does not mean homeowners can safely ignore the heating market.

The more important story is the direction of travel. Ofgem continues to adjust the energy price cap, the Government’s Warm Homes Plan is shaping future support for low-carbon heating and insulation, the Boiler Upgrade Scheme remains relevant to households considering a heat pump, and regulation of heat networks is progressing.

For homeowners, this is a useful moment to step back from headlines and concentrate on the condition, efficiency and running cost of the system already in the property. Late summer is also the best time to deal with heating faults, before engineers become busier and the first cold spell exposes weaknesses that have gone unnoticed for months.

What happened this week?

The honest answer is that there was no standout UK-wide heating story in the seven-day period. There was no confirmed nationwide boiler ban, no major recall affecting a commonly installed appliance and no new rule requiring homeowners to replace working gas boilers.

Instead, several established developments continued in the background:

• Ofgem’s energy price cap remained central to the amount households on standard variable tariffs pay for gas and electricity.
• Government work connected with warmer, more efficient homes and heat pump adoption continued through policy and regulatory processes.
• The Boiler Upgrade Scheme remained an important consideration for eligible households planning to move to low-carbon heating.
• Heat network regulation continued to develop, with particular relevance to people whose heating and hot water come from a shared communal system.

None of these subjects should be treated as a reason to make a rushed purchase. They should, however, influence how homeowners plan boiler repairs, replacement heating systems and energy-efficiency improvements over the next few years.

Why Ofgem’s price cap still matters

The energy price cap is often misunderstood. It is not a cap on the total amount shown on a household’s bill. It limits the unit rates and standing charges that suppliers can apply to customers covered by the cap. The more energy a household uses, the more it will still pay.

This distinction is particularly important for larger or poorly insulated homes. A detached property with high heat loss can spend considerably more than the figure used in national price-cap illustrations, even if it is on a capped tariff.

Heating efficiency therefore remains financially important whether the cap rises or falls. If gas becomes cheaper, wasted heat is still wasted money. If prices increase, faults such as poor controls, an incorrectly balanced system or excessive boiler flow temperatures become even more expensive.

Homeowners should check the actual figures on their tariff rather than relying on a headline about the cap. Look for the gas and electricity unit rates, both standing charges, the tariff end date and whether an exit fee applies. A smart meter or a sequence of regular meter readings can then show whether consumption is genuinely changing.

What heating efficiency means technically

A modern condensing gas boiler is designed to recover useful heat from water vapour in its flue gases. To do this effectively, the water returning from the radiators needs to be cool enough for condensation to occur inside the boiler’s heat exchanger.

If the heating flow temperature is set unnecessarily high, the return temperature may also remain high. The boiler can still heat the property, but it may spend less time operating in its most efficient condensing mode.

This does not mean every household should immediately turn its boiler temperature down to the lowest setting. The correct temperature depends on radiator sizes, insulation, outdoor conditions and the way the controls have been configured. A system must still heat the rooms properly and protect vulnerable occupants.

Efficiency is also affected by system condition. Sludge can restrict circulation, trapped air can leave radiators cold at the top, and poor balancing can cause radiators near the boiler to heat rapidly while distant rooms remain cool. A sticking zone valve, inaccurate thermostat or failed hot-water cylinder sensor can make the boiler run when useful heat is not required.

These are technical issues rather than tariff issues, but they directly affect the bill. Before assuming that high energy costs are entirely caused by the supplier, it is worth establishing whether the heating system is using fuel sensibly.

What the Warm Homes direction means for existing boilers

Government policy continues to encourage lower-carbon heating and better-insulated homes. Heat pumps are a major part of that approach, but there is still no general requirement for a homeowner to remove a serviceable gas boiler from an existing property simply because policy is moving towards electrification.

A well-maintained boiler may remain the most practical short-term option for many homes. The sensible question is not whether gas heating is disappearing overnight, but whether further spending on an ageing appliance represents good value.

If a boiler is repeatedly breaking down, has obsolete components or is combined with unsuitable controls, continuing to repair it may become uneconomic. Conversely, replacing a working boiler purely in response to an alarming headline may deliver a poor financial return.

Homeowners planning major renovation work should take a broader view. Insulation, airtightness, ventilation, radiator output, hot-water demand and electrical capacity all influence the choice of a future heating system. Improving the building fabric can reduce running costs now and make a later transition to a lower-temperature system easier.

Heat pumps and the Boiler Upgrade Scheme

The Boiler Upgrade Scheme can provide support towards eligible low-carbon heating installations, subject to the rules and funding available when an application is made. Homeowners should verify current eligibility and grant conditions before committing to a project.

A heat pump is not a direct like-for-like boiler swap. It extracts heat from the air or ground and transfers it into the home using electricity. Because heat pumps usually work most efficiently at lower water temperatures, the property may require larger radiators, underfloor heating or reductions in heat loss.

A competent design starts with a room-by-room heat-loss calculation. This assesses the amount of heat escaping through walls, roofs, floors, windows and ventilation when outdoor temperatures are low. The result is used to size the heat pump and the heat emitters.

Oversizing can increase cost and lead to inefficient cycling. Undersizing can leave the home dependent on backup heat or struggling during cold weather. A quotation based only on the output of the existing boiler is not a substitute for a proper assessment, because many gas boilers have far more maximum output than the home’s actual space-heating requirement.

Hot water must also be considered. Many heat pump installations use a cylinder, so properties with combi boilers need suitable space. The electrical supply, outdoor unit location, noise considerations, condensate drainage and planning rules may all affect feasibility.

Heat network regulation will not affect every household equally

A heat network supplies heating, hot water or both from a shared energy centre rather than an individual boiler in each home. These systems are more common in apartment blocks and larger developments, although communal systems can also appear in mixed-use buildings and private estates.

Progress towards stronger heat network regulation matters because residents on these systems cannot always switch heat supplier in the same way as conventional gas or electricity customers. Metering, billing transparency, maintenance responsibility and consumer protection are therefore especially important.

Most houses in Bordon, Whitehill, Liphook, Alton, Farnham and Haslemere have individual heating arrangements, but local apartment residents and purchasers of new-build properties should establish whether a communal network is involved. Before buying, ask who operates the system, how charges are calculated, which repairs are covered by service charges and what happens if the central plant fails.

What this means financially

The absence of a new announcement means homeowners should avoid basing decisions on speculation. The most reliable savings are usually achieved by reducing avoidable heat loss, correcting faults and using controls properly.

Start with the inexpensive measures: review heating schedules, avoid heating unused rooms excessively, use thermostatic radiator valves appropriately and make sure the main thermostat is not obstructed by furniture or exposed to a separate heat source. Draught-proofing and loft insulation can also provide meaningful benefits where they are currently inadequate, although ventilation openings installed for safety must never be blocked.

For larger expenditure, compare the whole-life implications rather than the purchase price alone. A cheap boiler installation with poor controls or no assessment of the existing system may cost more to run. A heat pump installed without suitable emitters may disappoint. Extensive repairs to a very old boiler can also become false economy if another major component fails soon afterwards.

Keep records of energy use in kilowatt-hours, not just pounds. Bills can rise because prices have changed even when consumption has fallen, while a lower direct debit does not necessarily mean the property has become more efficient.

Why the local housing stock matters

Heating advice must reflect the property. Around Bordon and Whitehill, newer developments can have different insulation standards, controls and communal arrangements from older housing. Liphook, Alton, Farnham and Haslemere also contain a broad mix of cottages, period homes, post-war properties and modern extensions.

An older solid-wall house may have much higher heat loss than a recent home of similar floor area. A property extended over several decades may contain different radiator sizes, pipework layouts and insulation levels. Homes in more rural positions may also need to consider oil, LPG or limited electrical capacity when planning replacement heating.

Local water conditions and system history matter too. Scale can affect domestic hot-water components, while corrosion debris in a sealed heating circuit can damage pumps, valves and narrow waterways. Treatment should be based on proper diagnosis rather than assuming every cold radiator requires a powerflush.

What homeowners should do before autumn

Run the heating before the weather turns cold and allow enough time to check every radiator. Listen for unusual noises, confirm that controls respond correctly and look for pressure loss, leaks or fault codes. If a sealed system repeatedly loses pressure, topping it up is not a permanent repair; the cause should be investigated.

Check the boiler’s service history and arrange servicing at an appropriate interval. A service is primarily about safety, condition and correct operation. It is not a guarantee that an old appliance will remain fault-free, but it can identify deterioration and provide an opportunity to discuss realistic repair or replacement planning.

If considering a heat pump, begin with insulation and heat-loss assessment rather than choosing equipment from a brochure. If retaining gas heating, ask whether the controls, system balance and operating temperatures are suitable. Households on a heat network should review billing information and understand who is responsible for faults inside and outside the property.

A quiet news week is not a reason to postpone sensible preparation. It is an opportunity to make decisions using the condition of the home, measured energy use and sound engineering rather than reacting to rumours.

Arrange practical heating advice

For boiler servicing, heating faults or advice on improving your system in Bordon, Whitehill, Liphook, Alton, Farnham or Haslemere, call Embassy Gas on (01420) 558993, email helpdesk@embassygas.com or book at https://www.embassygas.com/book.

A boiler that repeatedly locks out because of low water pressure can be frustrating, particularly when it leaves you without heating or hot water. In many sealed heating systems, restoring the correct pressure is a straightforward homeowner task. However, pressure that keeps falling usually indicates a leak, an expansion vessel problem or another fault that needs proper investigation. This guide explains the safe checks you can make, how to use a filling loop and when repeated topping up should stop.

Quick checks you can do now

Before touching any valves, look at the boiler display and pressure gauge. A low-pressure warning may appear as an error code, a flashing pressure value or a needle sitting below the normal operating range. Check the boiler manual because codes and recommended pressures vary between manufacturers and models.

Carry out this short checklist with the heating switched off and the system allowed to cool:

• Read the pressure gauge: many sealed systems should be around 1 to 1.5 bar when cold, but always follow the figure in the boiler manual.
• Note the error code: write it down before resetting or switching off the boiler.
• Look for visible water: check beneath the boiler, around radiators, at exposed pipe joints and near valves.
• Check recently bled radiators: releasing air also releases some water and can reduce system pressure.
• Inspect the outside discharge pipe: persistent dripping from a small copper pipe may indicate that a safety valve has opened.

If the gauge is in its normal range, do not add more water simply because the boiler has locked out. The fault may be unrelated to pressure, such as an ignition issue, frozen condensate pipe, circulation problem or electrical fault. Use the displayed error code and manufacturer instructions to identify the next appropriate step.

What a boiler pressure lockout means

A boiler pressure lockout is a protective shutdown. A sealed central heating system needs enough water pressure to circulate heated water safely through the boiler, radiators and pipework. If a pressure sensor detects a reading below its permitted level, the controls may prevent the boiler from firing.

Cold pressure commonly sits between 1 and 1.5 bar. It is normal for the reading to rise as the heating warms up because heated water expands. Depending on the system, it may reach roughly 1.5 to 2 bar before falling again as it cools. The important points are whether the readings remain within the manufacturer’s limits and whether the cold pressure is stable from day to day.

Not every home has a user-fillable sealed system. Some older properties have an open-vented arrangement supplied by a small feed and expansion cistern, often in the loft. Do not try to connect a filling loop or pressurise a system that was not designed for it.

How to top up boiler pressure safely

First, confirm from the manual that the boiler has a sealed system and that topping it up is an approved user task. Boilers can have an external braided filling loop, an integrated filling link, a key-operated device or a lever arrangement beneath the casing. Never remove the boiler casing to reach a filling mechanism; the casing forms part of the appliance’s safety system and should only be removed by a suitably qualified Gas Safe registered engineer.

If you can identify the filling device without removing a panel, use the following general process:

• Switch off the heating and wait for the boiler and radiators to cool so that the gauge shows the true cold pressure.
• Check the manufacturer’s target pressure, which is often around 1 to 1.5 bar when cold.
• Place a towel below an external filling loop in case a small amount of water escapes.
• Open the filling valve or valves slowly. You should normally hear mains water entering the heating circuit.
• Watch the gauge continuously and stop at the recommended cold pressure; do not rely on sound alone.
• Close every filling valve fully. If the design uses a removable hose or key, follow the manual’s instructions for removing and storing it.
• Check for drips, then restore power and follow the approved reset procedure once.

Different valves operate in different ways, so do not force a stiff handle or assume that its position matches another boiler you have used. If water does not enter, the gauge does not move or you cannot tell whether the valves are closed, stop rather than applying extra force.

Overfilling can make the pressure climb too high when the heating becomes hot. Do not deliberately operate the pressure relief valve to reduce it, as debris can prevent the valve from sealing again. If you have only slightly overfilled and understand how to bleed a cold radiator safely, releasing a small amount of water may lower the reading. Otherwise, leave the heating off and have the pressure corrected professionally.

Why the pressure keeps dropping

A small pressure reduction after bleeding several radiators can be normal, and a one-off top-up may solve the problem. Pressure should not routinely disappear from a sealed system, however. Adding fresh water every few days treats the symptom rather than the cause and introduces oxygen and minerals that can contribute to corrosion, sludge and scale.

Common reasons for recurring pressure loss include:

• A small heating leak: radiator valves, bleed points and pipe joints can lose water slowly enough for it to evaporate before forming a puddle.
• A leaking pressure relief valve: water may be discharged through an outside copper pipe, sometimes only while the system is hot.
• An expansion vessel fault: if the vessel has lost its air charge or its diaphragm has failed, pressure may rise sharply during heating and force water out through the relief valve.
• A faulty automatic air vent: staining or dampness inside or around the boiler can indicate a leak, but the casing must remain closed.
• Hidden pipework leakage: pipes beneath floors or inside walls can lose water without an immediately visible source.
• A filling valve passing water: a valve that is not fully closed can cause pressure to rise rather than fall and may eventually trigger discharge.

A useful test is to record the cold pressure, run the heating normally and note both the hot reading and the next cold reading. A large rise towards the upper limit followed by a substantial drop is often associated with expansion vessel or relief valve issues. This observation is helpful diagnostic information, but it is not a reason to dismantle or recharge components yourself.

Resetting and troubleshooting after topping up

Once the cold pressure is correct and the filling valves are shut, follow the reset instructions in the boiler manual. Some appliances have a dedicated reset button, while others require a control to be held in a particular position briefly. Reset only once unless the manufacturer specifically advises otherwise.

If the boiler starts, allow it to run and monitor the gauge. Check that radiators warm normally and that the pressure does not race upwards. Air released by automatic vents or recently bled radiators can cause a small subsequent drop, so one minor adjustment may be needed. Repeated adjustments are not normal.

If the same boiler pressure lockout returns despite the gauge being correct, the displayed code may be caused by a pressure sensor, pump, circulation or control fault. Repeatedly pressing reset will not repair the underlying issue and can make the sequence of events harder to diagnose. Keep a simple record of the error code, cold and hot pressure readings, how quickly pressure changes and whether water appears anywhere.

Also check that the electrical supply is on, the programmer is requesting heat and room thermostats have working batteries where applicable. These basic checks can identify a separate control issue, but they should not involve opening the appliance or working on fixed electrical wiring.

When to stop and arrange an engineer visit

Stop topping up if pressure falls again within hours or days, if you need to refill more than occasionally, or if you find water near the boiler. Professional attention is also appropriate when the pressure rises close to 3 bar as the heating warms, the outside discharge pipe drips, a filling valve will not close, the gauge behaves erratically or the boiler continues to lock out at the correct pressure.

Do not remove the casing, adjust gas components, recharge an internal expansion vessel or replace a pressure relief valve yourself. If water is reaching electrical parts, switch off the appliance only where it is safe to do so. If you smell gas, avoid flames and electrical switches, leave the property and follow the national gas emergency procedure.

Homes across Bordon and Whitehill in GU35, Alton in GU34, Liphook and Farnham in GU9 can experience the same sealed-system pressure problems regardless of boiler make. Older radiator valves, concealed pipework and systems that have recently been altered are all worth considering when a pressure loss keeps returning. A proper diagnosis should find where the water is going rather than making repeated top-ups part of normal boiler use.

Next steps: if your boiler keeps losing pressure or locking out, arrange a professional check with Embassy Gas on (01420) 558993.

The big story this week: Ofgem confirms a 13% energy price cap rise from 1 July 2026

Ofgem has announced that the energy price cap will rise by 13% for the period 1 July to 30 September 2026. This affects customers on default (standard variable) tariffs—in other words, the tariff you’re most likely to be on if you haven’t fixed recently.

This isn’t just a headline number. The price cap changes the unit rates (what you pay per kWh of gas and electricity) and the standing charges (the daily cost of being connected). Because UK home heating is dominated by gas boilers and because hot water is used year-round, the impact is very real even in summer.

For homeowners across Bordon, Whitehill, Liphook, Alton, Farnham and Haslemere, this is the kind of change that can quietly add hundreds of pounds to annual energy spend if you do nothing—and it can also be the prompt to finally tighten up the parts of your heating system that leak money every day.

What actually happened (and who it hits)

The Ofgem price cap is designed to limit what suppliers can charge customers on standard variable tariffs. It’s reviewed and updated quarterly and reflects the costs suppliers face—especially wholesale energy costs—plus network costs, policy costs and operating allowances.

From 1 July, the cap level increases by 13%. Practically, that means:

• Higher gas and electricity unit rates for most customers on default tariffs.
• Standing charges may also change, depending on region and the way Ofgem has set the allowance for network and operating costs.
• The rise applies across the country, but your exact rates depend on your region and meter type.

If you’re on a fixed deal, you’re insulated until that fix ends. If you’re on a smart tariff, tracker, or bespoke product, the cap may not apply in the same way. But a large proportion of households—especially those who have rolled off fixes—will feel this directly.

Why it matters: heating is still your biggest controllable energy cost

Even though the price cap period covers summer, it shapes your bills in three important ways:

1) Hot water doesn’t take a summer holiday. If you have a combi boiler, your domestic hot water demand continues every day. If you have a system boiler with a cylinder, you’re paying to heat and store hot water—sometimes more often than you need.

2) Inefficiency is more expensive when unit rates rise. A boiler at 75–80% efficiency costs noticeably more to run than one operating correctly at 88–92% once you factor in controls, flow temperatures and cycling.

3) Summer is when you can fix issues without disruption. Winter breakdowns are stressful and they’re often the most expensive time to respond. July is the perfect moment to service, balance, and upgrade controls while you’re not reliant on heating daily.

What it means technically (plain-English version)

When energy prices rise, homeowners often ask, “Should I replace the boiler?” Sometimes yes—but in many homes the biggest win comes from making the existing system operate properly.

Boiler efficiency isn’t a fixed number—it depends on how it’s set up

Modern condensing boilers are designed to reclaim heat from the flue gases. They do that best when the return water temperature back to the boiler is low enough for condensation to occur. In practice, that usually means running lower flow temperatures, especially for central heating.

If your boiler is set to a high flow temperature (common after installs or powerflushing), it may still heat the house—but it will spend less time condensing and more time behaving like an older, less efficient boiler. With higher unit rates from July, those wasted kWh cost more.

Controls make a bigger difference than most people realise

A well-controlled heating system is not “on or off.” It’s responsive. The main upgrades that affect real-world running costs include:

• A programmable room thermostat (or smart thermostat) to reduce unnecessary run time.
• TRVs (thermostatic radiator valves) so rooms don’t overheat.
• Weather compensation / load compensation where compatible, allowing the boiler to modulate more smoothly.

In towns like Haslemere and Farnham, where a lot of housing stock includes extended period properties and mixed radiator sizing, proper controls can stop the common cycle of overheating one end of the house while another stays cool.

Standing charges mean “using less” isn’t the whole answer

A standing charge is a fixed daily cost, so you can’t eliminate it through efficiency. That’s why, with price cap rises, it’s sensible to tackle both sides:

• Reduce consumption (efficiency, controls, insulation, repairs).
• Review tariffs (fixing, switching, checking eligibility for support).

What it means financially: where the extra cost really comes from

A 13% rise in the cap doesn’t translate neatly into “my bill rises 13%,” because your total spend depends on usage, property type, how many people live there, and whether you’re gas-heated, electric-heated, or using a heat pump.

But the direction of travel is clear: each wasted unit now costs more. That changes the payback calculation on several common improvements.

What typically pays back faster when prices rise

Here’s how the economics tend to shift when unit rates increase:

• Boiler service and combustion check: Not glamorous, but it can prevent inefficient burning, reduce cycling issues and catch early faults that become expensive failures later.
• Control upgrades: If your thermostat is old, poorly located, or you’re effectively running “manual,” you’re often heating the house longer than needed.
• Reducing boiler flow temperature (when appropriate): This is one of the cheapest changes with a meaningful impact on gas usage, particularly in milder weather.
• Radiator balancing: Helps rooms reach temperature evenly, reducing the temptation to “just turn it up,” and improving boiler modulation.
• Insulation and draught-proofing: Especially loft insulation top-ups and sealing obvious drafts around doors and old sash windows.

For homeowners around Alton and Liphook, where you’ll find plenty of family homes with loft space and accessible pipework, the quick wins often come from a combination of controls plus basic fabric improvements.

What it means locally: Bordon, Whitehill, Liphook, Alton, Farnham and Haslemere

The price cap is national, but the reality on the ground varies with housing stock and how people heat their homes.

Older, larger properties (common around Farnham and Haslemere)

Period homes and larger detached properties can have:

• Higher heat loss (solid walls, single glazing, lots of external wall area)
• Multiple hot water outlets and longer pipe runs
• Older radiators or mixed upgrades over time

Practically, that means your priority should be controls, zoning and flow temperature optimisation, paired with sensible insulation measures. Where budgets allow, a heat-loss assessment can stop you spending money in the wrong place (for example, fitting oversized boilers or running excessive temperatures).

Post-war and modern estates (common across Bordon and Whitehill)

Many properties here are more standardised, which can make improvements straightforward and cost-effective. If your home has a modern-ish condensing boiler but bills still feel high, it’s often due to:

• Poor thermostat placement
• No proper scheduling
• Unbalanced radiators
• Boiler set to unnecessarily high heating temperature

These are all areas where a good engineer can make measurable improvements without major disruption—exactly the sort of practical response that makes sense when the cap rises.

Rural edges and mixed systems (around Liphook and Alton)

In and around these areas, you may come across homes with:

• Older system boilers and hot water cylinders
• Secondary heating (wood burners, electric heaters)
• Outbuildings, annexes or extensions added over time

Here, the hidden costs often sit in hot water settings and timers. Many cylinders are heated longer than needed, or heated at the wrong times. Getting the hot water schedule right—plus insulating the cylinder and primary pipework—can cut gas use year-round.

What homeowners should do next (practical steps that actually help)

1) Check what tariff you’re on before 1 July

Log into your supplier account (or check a recent bill) and confirm whether you’re on a standard variable tariff. If you are, you’ll be moved automatically onto the new capped rates. Consider:

• Whether a fixed tariff is available and suitable for your household’s risk appetite
• Whether you’re eligible for any supplier support schemes or payment plans if bills are tight

Don’t guess—people often assume they’re “fixed” when they’re not, especially after a deal ends.

2) Set your boiler to run efficiently (without losing comfort)

If you have a combi or system boiler with radiator heating, look for the central heating flow temperature setting (not the hot water temperature on a combi). Many homes run at 70–80°C out of habit. In plenty of properties, you can drop that and still stay comfortable—particularly in spring/autumn—and the boiler will condense more often.

As a sensible starting point, many homeowners try 60°C for radiators and improve from there, but the “right” temperature depends on radiator sizing and heat loss. If lowering it means rooms struggle to reach temperature in cold snaps, it needs proper assessment rather than simply turning it back up permanently.

3) Stop heating water you don’t use

If you have a hot water cylinder:

• Check the timer: you usually only need one or two heat-up periods per day, depending on household size.
• Set the cylinder stat correctly (typically around 60°C for stored hot water for hygiene and performance).
• Make sure the cylinder has a good jacket, and insulate exposed primary pipework—especially in airing cupboards.

For combi boilers, the big one is hot water preheat (if fitted). It improves tap response time but keeps the boiler ready to fire, which can increase gas use. If you’re out during the day, switching preheat off may save money.

4) Book a service before the autumn rush

Servicing is about safety first (checking combustion, ventilation, condensate, and flue integrity), but it’s also about preventing small inefficiencies becoming expensive problems. A decent service can identify:

• Early signs of heat exchanger issues
• Poor burner performance
• Low system pressure trends or expansion vessel faults
• Controls that aren’t talking properly to the boiler

In areas like Bordon and Whitehill, where many households try to book repairs at the first cold snap, getting in early is one of the simplest ways to avoid being stuck in a queue later.

5) Treat cold rooms as a system problem, not “a bigger radiator” by default

If one room in your home in Farnham or Haslemere is always cold, it might need a radiator upgrade—but it could just as easily be:

• An unbalanced system (radiators stealing flow)
• A stuck TRV or lockshield
• Sludge restricting circulation
• An undersized pipe run to an extension

Throwing a larger radiator at the problem can mask the issue and push you to run higher flow temperatures. Diagnosing properly helps you stay comfortable at lower temperatures—exactly what you want when unit rates rise.

The bigger picture: price cap rises make “wasted heat” the most expensive heat

It’s easy to feel like energy prices are something that happens to you. But once the rate per kWh increases, the value of good heating engineering increases too. The households that come through these price swings best are usually the ones with:

• A safe, well-maintained boiler or heat pump
• Controls that match how they actually live
• Reasonable flow temperatures and balanced heat delivery
• Basic insulation and reduced draughts

Whether you’re in a newer property in Liphook, a family home in Alton, or an older place near Haslemere, the next few weeks are a good window to reduce consumption before the next winter demand spike arrives.

If you want help checking your boiler settings, upgrading controls, balancing radiators, or planning a longer-term efficiency upgrade, book a visit with Embassy Gas: https://www.embassygas.com/book | (01420) 558993 | helpdesk@embassygas.com

The UK’s biggest heating policy change this week: Boiler Upgrade Scheme grants updated (effective 21 July 2026)

If you’ve been sitting on the fence about a heat pump, the last seven days brought the clearest signal yet that the government wants more homeowners to make the switch.

On 21 July 2026, GOV.UK updated the Boiler Upgrade Scheme (BUS) notice of approved grant categories and values. This isn’t just a small tweak. It expands eligibility and updates grant values for heat pumps and related configurations, with particular attention to homes that aren’t on mains gas (oil/LPG/coal/electric heated properties), and a wider range of “real-world” installations that better reflect how UK homes actually work.

What happened (in plain terms)

The BUS is the main government grant for homeowners in England and Wales to replace fossil-fuel heating with low-carbon heating—primarily air source and ground source heat pumps. The 21 July 2026 update changes the recognised categories and the grant levels tied to them.

While the exact category table is detailed, the headline outcomes for homeowners are:

• Higher and/or more targeted grant support for heat pumps, including off-gas-grid scenarios (with figures in the update indicating £7,500 for many properties and up to £9,000 in some off-gas-grid situations).
• Wider eligibility for replacing systems like oil, LPG, coal or direct electric heating, and recognition of more heat pump configurations that installers routinely specify.
• A clearer push to accelerate domestic decarbonisation—more installations, faster.

For homeowners in places like Bordon, Whitehill, Liphook, Alton, Farnham and Haslemere, this is especially relevant because the housing stock is mixed: suburban gas-connected homes sit alongside rural and edge-of-town properties that may still rely on oil, LPG or older electric heating.

Why it matters

1) It changes the “maths” of switching

For most households, the decision to move from a boiler (or old electric heating) to a heat pump comes down to three numbers:

• Upfront cost (install price minus grant)
• Running cost (electricity consumption versus heat delivered)
• Future-proofing (likely regulations, fuel price volatility, and property value)

By increasing grant values and supporting more situations, the BUS reduces the upfront pain point that stops many people from getting past the quotation stage.

2) It’s a particularly big deal for off-gas homes

If you’re on mains gas in Farnham, parts of Alton, or central Haslemere, you can compare a modern boiler’s running costs to a heat pump’s running costs and it’s a nuanced choice based on insulation, radiator sizing and your tariff.

If you’re off-gas—more common around the fringes of Liphook, rural lanes near Whitehill, or properties outside Bordon—your current fuel may be LPG or oil. Those fuels are often expensive, sometimes volatile, and bring storage, delivery and maintenance considerations. Bigger grants aimed at off-gas scenarios can shift heat pumps from “nice idea” to “practical project.”

What it means technically (without the jargon)

Heat pumps only work brilliantly when the system is designed for them

A heat pump isn’t a like-for-like boiler swap. A boiler makes very hot water quickly. A heat pump runs more like a fridge in reverse: it moves heat from outside to inside, and works best delivering heat steadily at lower temperatures.

That has a few technical consequences that homeowners need to understand before signing anything:

• Flow temperature matters. If your radiators are sized for a boiler running at 70–80°C, a heat pump running nearer 45–55°C may struggle unless radiators (or emitters) are upgraded.
• Heat loss is the foundation. Your home’s heat loss calculation dictates heat pump size. Oversizing costs more and can run less efficiently; undersizing leads to cold rooms in January.
• Hot water is a separate design piece. Most heat pump installs use a hot water cylinder, because producing hot water instantly (combi style) is usually not how a domestic heat pump is set up.

What “wider eligibility” often means in the real world

When BUS rules broaden categories, it typically helps homeowners whose homes don’t match a neat template. For example:

• Homes replacing older electric heating (storage heaters, panel heaters) where a heat pump plus cylinder and upgraded radiators makes a significant comfort difference.
• Properties with oil or LPG where the old system may be due for replacement anyway (tanks, flues, ageing boilers).
• Installations requiring particular heat pump arrangements due to space constraints or layout—common in tighter plots around Haslemere or older homes in Alton where plant space is limited.

The practical takeaway is: more households now fall into a grant-backed pathway, but you still need a technically sound design and an installer who will commission the system properly.

What it means financially: upfront costs, running costs, and payback reality

Upfront cost: the grant reduces the gap, but doesn’t remove the need for upgrades

The BUS is a contribution, not a blank cheque. Even with grants in the £7,500 range (and potentially up to £9,000 for some off-gas situations referenced in the update), many homes still need some combination of:

• bigger radiators or additional emitters
• a hot water cylinder
• pipework alterations
• electrical works (consumer unit checks, dedicated supply, isolators)
• minor insulation improvements to make the system viable

If you’re budgeting, don’t just compare “boiler replacement cost” to “heat pump cost.” Compare whole-system cost to whole-system benefit (comfort, stability, safety, and future bills).

Running cost: efficiency is everything

Heat pump performance is usually described by SCOP (seasonal coefficient of performance). Think of it like “units of heat out” per “unit of electricity in.” In simple terms:

• If a system averages a SCOP of 3.0 across the year, you get roughly 3 kWh of heat for every 1 kWh of electricity.
• The lower your required flow temperature, the higher the efficiency tends to be.

That’s why emitter sizing and heat loss work are not optional extras. They are the difference between a system that feels cheap to run and one that disappoints.

Payback: treat it as a “replacement cycle” decision

Homeowners often ask, “How many years until it pays back?” That’s not always the right framing. A better question is:

“My current heating system will need replacing within X years—what replacement choice gives me the best comfort and cost control for the next 10–15 years?”

If your oil boiler is 15+ years old near Liphook, or your LPG system around Whitehill is increasingly temperamental, the BUS update may significantly improve the economics of choosing a heat pump at the point you’d otherwise spend money on another fossil system.

Local relevance: what this update means in Bordon, Whitehill, Liphook, Alton, Farnham and Haslemere

Housing stock shapes the best option

In our area, we see a wide mix: newer estates, 1930s–1980s builds, and character properties with extensions that have uneven insulation. That mix affects how straightforward heat pump upgrades are.

• Bordon & Whitehill: Many homes have reasonable garden/side access which can help with outdoor unit positioning and pipe runs. Some households still have older heating controls—upgrading controls and balancing can make a noticeable comfort difference even before any heat pump work begins.
• Liphook: A blend of village homes and rural properties—off-gas situations are more common once you’re outside the centre. The BUS emphasis on off-gas replacements is particularly relevant here.
• Alton: A lot of solid, family homes where radiator upgrades are feasible. If you’re on mains gas, you’ll want careful design to ensure heat pump running costs stack up—especially if insulation is middling.
• Farnham & Haslemere: Space constraints, conservation considerations, and aesthetic concerns can be bigger topics. Outdoor unit placement, noise assessment, and routing pipework neatly become part of the “real job,” not a quick add-on.

Noise, location and planning: the practical bits people forget

Modern air source heat pumps are far quieter than older models, but siting still matters. If you live in a tighter spot in Haslemere or a close in Farnham, you need to think about:

• distance to neighbours’ windows
• mounting method (wall brackets vs slab)
• vibration isolation
• airflow clearance (don’t box it in)

A good installer will treat this as part of design, not something to “see on the day.”

What homeowners should do next (so you actually benefit from the grant)

Step 1: Work out whether you’re a strong candidate

You are usually a stronger heat pump candidate if:

• your home is reasonably insulated (or can be) and draughts are manageable
• you have space for a hot water cylinder and an outdoor unit
• you’re willing to upgrade some radiators if needed
• your current system is oil/LPG/older electric, or your gas boiler is near end-of-life

You may need more careful assessment if you have lots of single glazing, large open-plan areas with high heat loss, or very limited outdoor space.

Step 2: Ask for a proper heat loss survey (not a “rule of thumb” quote)

Don’t accept a heat pump size based purely on floor area. You want room-by-room heat loss, emitter output checks and a proposed design flow temperature. In plain English, you’re asking the installer to prove the system will heat your house efficiently—especially important in older Alton properties, rural Liphook homes, and character buildings around Farnham and Haslemere.

Step 3: Check what’s happening with radiators and hot water

Before you sign, make sure the plan clearly states:

• which radiators will be upgraded (if any)
• cylinder size and location
• whether pipework is being resized or re-routed where needed
• what controls you’ll have (and how to use them)

Heat pumps reward good commissioning: system flushing, correct inhibitor, proper balancing, and controls configured to run low and steady.

Step 4: Pressure-test the running cost estimate

Ask the installer how they’ve estimated annual consumption. A credible answer will reference heat loss, expected flow temperature, and an assumed seasonal efficiency. If the estimate hinges on “you’ll save loads” without technical backing, treat it as a red flag.

Step 5: If you’re not switching yet, still take advantage of the moment

Even if a heat pump isn’t right for you this year, this BUS update is a cue to prepare:

• Improve loft insulation and fix draughts
• Replace a couple of undersized radiators during routine decorating
• Upgrade heating controls and get the system balanced
• If you’re on oil/LPG, plan the replacement cycle so you aren’t forced into a rushed decision in winter

These measures improve comfort now and make a future heat pump easier and cheaper to implement.

The bottom line: more money is available, but good engineering still decides whether it feels worth it

The government has made heat pumps more accessible on paper by increasing and refining BUS grants and widening eligible scenarios. For homeowners in Bordon, Whitehill, Liphook, Alton, Farnham and Haslemere, the opportunity is real—especially where oil, LPG, coal or older electric heating is in play.

But the grant does not replace the need for correct sizing, suitable emitters, and careful commissioning. If those parts are done well, a heat pump can deliver steady comfort and a more predictable long-term heating setup. If they’re rushed, it can be an expensive frustration even with a grant attached.

To book a home heating assessment and BUS eligibility discussion with Embassy Gas, call (01420) 558993, email helpdesk@embassygas.com, or book online at https://www.embassygas.com/book

The story this week: Ofgem steps in after June’s extreme heat stressed the electricity system

Ofgem has announced a formal review and an independent investigation into how the UK’s electricity system was operated during June’s extreme heat event. The regulator has commissioned NESO (National Energy System Operator) to produce a post‑event analysis covering the weather conditions, how the system was run, and how key decisions were made. Separately, Ofgem is also overseeing matters linked to whistleblowing allegations about NESO’s conduct during the event.

That might sound like distant, national‑level news. But for homeowners in places like Bordon, Whitehill, Liphook, Alton, Farnham and Haslemere, it points to something very practical: the UK’s energy system is being pushed harder in summer than it used to be. That changes how we should think about heating, hot water, heat pumps, smart tariffs, and home resilience generally.

What actually happened (in plain English)

During the June heat, the electricity system had to cope with conditions that are becoming more common: prolonged high temperatures, higher daytime demand (especially from cooling, refrigeration, and workplaces), and constraints on parts of the infrastructure that were designed for a different climate pattern.

Ofgem’s move signals two things:

• This mattered enough to trigger formal regulatory scrutiny, not just an internal “lessons learned”.
• System operation during extreme heat is now being treated as a consumer issue—because if the grid is strained, households can face higher costs, disrupted service, or new rules around demand management.

Even if you personally didn’t notice any disruption in Hampshire or the Surrey borders, the investigation is about how close the system came to trouble, and whether operational decisions were appropriate. The outputs can influence future guidance on how the grid is managed in heatwaves—right down to how household devices are encouraged (or incentivised) to run.

Why this matters to homeowners (it’s not just a “power industry” story)

Historically, most households worried about energy resilience in winter: frozen condensate pipes, boiler breakdowns, high gas bills. But the UK is now living with a different pattern:

• Hotter summers that push electricity usage up.
• More electrification (heat pumps, EV charging, induction cooking).
• More “smart” control (time‑of‑use tariffs, automated load shifting).

As more heating and hot water becomes electrically driven, the way the grid performs on the hottest days starts to affect your comfort and running costs just as much as what happens on the coldest nights.

In practical terms for homes in Farnham and Haslemere with larger properties and home offices, or newer developments around Bordon/Whitehill where electrification is more common, peak summer electricity demand can translate into:

• Greater price volatility on flexible tariffs.
• More calls to shift usage (e.g., running hot water or charging EVs at different times).
• More attention on “demand” devices like heat pumps, immersion heaters, and battery systems.

The technical bit: how extreme heat changes grid performance

It’s tempting to think: “Heatwaves mean less heating, so surely energy demand falls.” In reality, heatwaves can put the electricity system under strain for several engineering reasons:

1) Power cables and lines carry less safely in high temperatures

Overhead lines sag more when they get hot. Underground cables and transformers have thermal limits too. When ambient temperatures are high, the system sometimes has to run equipment with more caution, which can reduce the effective capacity available at peak times.

2) Some generation performs less efficiently

Heat can reduce the efficiency of certain power stations, and maintenance schedules can coincide with summer. Not every part of the generation fleet is equally comfortable in prolonged high temperatures.

3) Demand patterns change sharply

Air conditioning is not as widespread in UK homes as in hotter countries, but it is growing in workplaces, server rooms, retail, and newer domestic installs. Add to that increased use of fans, refrigeration working harder, and people at home using more appliances during heat stress. The result is a different peak demand profile—often peaking later in the day than traditional winter peaks.

4) Electrified heating still matters in summer because of hot water

If you have a heat pump or an electric cylinder/immersion for hot water, you still have an electrical load even when you’re not “heating the house”. On very hot days, some systems will also work harder to keep cylinder temperatures stable and safe (particularly if you’re using hot water more frequently due to showers).

5) Smart control becomes part of system operation

The modern grid increasingly relies on demand response—encouraging loads to move away from stressed periods. Ofgem’s focus on decision‑making during the heat event hints that operational choices (not just the weather) can affect outcomes. That matters because many households now have devices designed to respond automatically: smart thermostats, heat pump controllers, EV chargers, and battery inverters.

What it means technically for home heating and hot water

For most homeowners, the immediate question is: “Will my boiler or heat pump be affected?” The answer depends on your system.

If you have a gas boiler

A gas boiler is not directly dependent on grid capacity to produce heat, but it does rely on electricity for controls, ignition, pumps and fans. If there’s a power cut, your boiler will not run. The Ofgem review is not predicting outages; it’s investigating system operation. However, it underlines why it’s sensible to think about short power interruptions and what they mean for:

• Hot water availability (no electrics = no boiler operation).
• Heating controls (smart thermostats, internet hubs, and zone valves may not behave as you expect after an interruption).

In towns like Alton and Liphook where many properties are still gas‑heated, a heatwave grid issue won’t raise heating demand, but it can still impact hot water continuity and appliance behaviour.

If you have a heat pump

Heat pumps are fully dependent on electricity, and their running costs can be more sensitive to time-of-use pricing. During stressed grid periods, you may see:

• Higher peak prices on agile tariffs.
• More incentive to pre-heat hot water earlier in the day (while staying within safe temperatures and manufacturer guidance).
• Potential utility “events” asking customers to avoid discretionary use at certain times.

Technically, a heat pump also has operating limits in high ambient temperatures—though in summer it’s normally only producing hot water. If your unit is installed in a tight, sun‑baked location (a south‑facing corner with poor airflow is a common culprit), extreme heat can reduce performance and may trigger protective behaviour. That is an installation/detail issue we can usually improve: shading, clearance, air circulation, and correct siting.

If you rely on an immersion heater for hot water

An immersion heater is simple but expensive to run at peak rates. If system stress in heatwaves pushes prices up, the “hidden” cost of that cylinder can jump. Many homes in the area—especially older properties in Haslemere or rural edges around Farnham—have cylinders where the immersion has become the default due to a failed programmer, a broken boiler control, or a miswired hot water zone. That’s easy to miss because it still “works”, just at a much higher cost.

What it means financially: bills, tariffs and the cost of doing nothing

Ofgem’s investigation isn’t a new charge on your bill. The financial relevance is more indirect—but very real:

1) Peak pricing exposure is becoming a bigger deal

If you’re on a smart tariff that tracks wholesale conditions, stressed periods can mean higher electricity costs. Heat pumps, immersion heaters, and EV chargers can magnify that. A household in Whitehill with a heat pump and an EV could see “coincidental load” (hot water + charging + cooking) landing right in an expensive window unless it’s actively managed.

2) Energy resilience improvements may become better value

As the grid leans more on demand flexibility, investments like better hot water insulation, properly set cylinder schedules, and smart controls that are configured correctly become more worthwhile. These are not glamorous upgrades, but they can materially reduce your exposure to peaks.

3) Poorly set systems cost more in summer than most people realise

We often find summer running costs caused by:

• Cylinders maintained at unnecessarily high temperatures all day.
• Immersion heaters left permanently on.
• Heat pumps cycling due to incorrect hot water settings.
• Timers wiping their programmes after brief power interruptions.

Heatwaves don’t cause those faults, but they make the cost of them more painful—especially if prices are peaky.

Local relevance: what households in Bordon, Whitehill, Liphook, Alton, Farnham and Haslemere should watch for

National grid events land locally in different ways. In our patch, there are a few patterns worth noting:

• Mixed housing stock: From period properties around Farnham and Haslemere to newer housing around Bordon/Whitehill. That means a wide spread of system types—combis, system boilers with cylinders, heat pumps, and hybrid setups.
• Longer hot water pipe runs in larger homes: Bigger properties can have higher hot water losses, so poorly insulated pipework quietly drives up summer energy use.
• Home working: In areas like Liphook and Alton, daytime occupancy is often higher than it used to be. That changes when hot water demand happens, and it can clash with peak electricity periods.

The Ofgem review is essentially a warning light that “summer peaks” are now important. Even if your heating is off, your home is still an energy system.

What homeowners should do next (practical steps that actually help)

Check what heats your hot water today

Find out whether your hot water is being made by: boiler, heat pump, immersion heater, or a mix. If you have a cylinder, confirm whether the immersion is on a timer or permanently energised. A surprising number of households are unintentionally using immersion as the primary heat source.

Review your hot water schedule and cylinder temperature

For most homes, you don’t need all‑day hot water heating. A timed heat period (or two shorter periods) is usually enough. Keep temperature settings within manufacturer guidance and safety requirements—hot water must be stored hot enough to control legionella risk, but it also shouldn’t be running higher or longer than necessary.

Make sure your controls recover properly after a brief power cut

If your programmer loses time or settings when power is interrupted, you can end up with heating/hot water running at odd times. If you’ve noticed the clock drifting, displays flashing, or schedules “forgetting”, it’s worth sorting now—these small faults translate into real money on modern tariffs.

Heat pump owners: check airflow, siting and summer hot water behaviour

Look at where the outdoor unit sits. Is it in full sun with limited clearance? Are leaves/debris restricting airflow? Does it short‑cycle when making hot water? These issues don’t always break the system, but they affect efficiency and reliability during extremes.

Consider surge protection and sensible electrics for plant rooms

As homes add controls, Wi‑Fi thermostats, smart relays and motorised valves, they become more sensitive to electrical disturbances. A qualified electrician can advise on protection where appropriate. It’s not about panic; it’s about recognising that more of your comfort now depends on electronics.

If you’re considering a heat pump, design for both winter cold and summer heat

Heat pump conversations too often focus only on “can it heat the house in January?” A good design also anticipates:

• How hot water will be made efficiently year‑round.
• How the system will run on flexible tariffs.
• Where the outdoor unit will sit to avoid heat stress and noise issues.

That’s particularly relevant for homeowners planning upgrades in Bordon and Whitehill, where property improvement and electrification are common topics.

What to expect next from Ofgem’s review (and how to stay ahead)

Ofgem’s process is aimed at establishing facts, learning lessons, and strengthening resilience. For households, the likely downstream effects over time are:

• More emphasis on demand flexibility and smart usage during stressed periods.
• Greater scrutiny of operator decision‑making, which can shape future operational rules.
• Potential consumer guidance around participation in flexibility schemes and protections where automated control is involved.

You don’t need to wait for the final report to benefit. The best “homeowner response” is to treat hot water and heating controls as an engineered system, not just a set-and-forget utility. A quick audit of what you’ve got—what heats the water, when it runs, and whether it’s behaving as intended—can cut waste and reduce your exposure to peak prices, regardless of what the grid does next.

Need a proper check of your hot water controls, immersion setup, heat pump settings or overall system efficiency? Book with Embassy Gas: https://www.embassygas.com/book | (01420) 558993 | helpdesk@embassygas.com

When the hot taps only run lukewarm, daily routines become frustrating fast. Whether you rely on a combi boiler or a cylinder-and-boiler setup, understanding why the temperature drops is the first step to a reliable fix. This guide explains what typically causes temperature issues and offers clear, practical checks you can safely do at home. Homeowners across Bordon, Whitehill, Liphook, Alton, Farnham and surrounding GU35, GU34 and GU9 areas often experience similar symptoms, so the steps below apply widely.

Quick checks you can do now

Before diving deeper, run through these simple tests. They take only a few minutes and often point you in the right direction.

• Run just one hot tap at a time to see if the temperature improves.
• Check whether the boiler or cylinder thermostat is set too low.
• Listen for the boiler firing when you open the hot tap.
• Confirm no one else is using water elsewhere in the property.
• Check that the cylinder immersion switch (if fitted) is actually on.

Why you might experience water not hot enough

This issue usually comes down to one of three things: insufficient heating inside the hot water cylinder, a failing immersion heater, or low boiler output due to high water demand. Understanding which applies to your setup helps narrow the cause quickly.

Temperature issues with hot water cylinders

If you have a system or regular boiler with a cylinder, the stored water must reach at least 55–60°C to feel properly hot at the tap. When it doesn’t, the following are the main suspects:

• Thermostat set too low: If the cylinder stat is below 55°C, the water may feel merely warm.
• Boiler flow temperature reduced: Modern boilers allow user-adjustable flow temps; if set too low, the cylinder never reaches its target.
• Sludge or scale on the coil: This reduces heat transfer, especially in hard-water areas like parts of Alton and Farnham.
• Faulty motorised valve: If the valve is stuck, the cylinder may not receive heat even if the boiler is running.

Checklist: what to inspect on your cylinder

• Find the cylinder thermostat and confirm it is set between 55–60°C.
• Listen for a click when adjusting the dial, indicating it is activating.
• Check the programmer or controls to ensure hot water mode is actually on.
• Feel the flow pipe into the cylinder during heating; it should be noticeably hot.

If the pipe stays cool, the water is not being heated properly, and the issue is likely with the boiler, valves, or flow temperature setting.

Immersion heater problems

An immersion heater acts as a backup or primary water heater depending on how your system is set up. When it develops faults, you may get lukewarm water or none at all. Common signs include the immersion switch showing power but no actual heat, or the cylinder warming extremely slowly. In older homes around Bordon and Whitehill, immersions are often original and may simply have aged elements.

• Check the fused switch is on and the fuse intact.
• Confirm the immersion thermostat is set correctly.
• Listen for slight humming or heating noise; silence can indicate a failed element.

If the immersion still produces no heat after these checks, the element is likely failed and requires professional replacement.

Combi boilers: flow rate and why it matters

Combi boilers heat water on demand. This means if too much water flows through the unit, it cannot heat it sufficiently, resulting in tepid water. This is particularly common during winter when incoming mains water is colder.

To test this, run a single hot tap fully open and time how long it takes to fill a 1-litre jug. If you get more than 6–7 litres per minute on a small-to-medium combi, the boiler may struggle to raise the temperature. Reducing the flow slightly usually stabilises the temperature.

Testing flow rates at home

This simple test helps determine whether your combi is being overwhelmed:

• Open the hot tap fully.
• Fill a 1-litre container and time it.
• Calculate litres per minute (LPM) by multiplying by 60.
• If above the boiler’s rated LPM, reduce the tap opening and re-test.

Homeowners in GU35, GU34 and GU9 areas often report that slightly reducing the hot tap flow restores stable, properly hot water.

System boilers and slow recovery issues

For system boilers with cylinders, poor recovery time is another common cause of lukewarm water. If the boiler output is too low, or the cylinder coil is scaled, the water reheats slowly. This is noticeable when multiple showers run within a short period.

Check your programmer settings to ensure sufficient hot water heat-up times. If you notice the boiler cycling rapidly or failing to ramp up, a heating engineer may need to assess the boiler’s flow temperature or pump performance.

Next steps to get your hot water working properly

If you have checked thermostats, immersion heaters and flow rates but still cannot restore full temperature, professional testing may be needed. A Gas Safe engineer can verify boiler temperatures, motorised valves, cylinder performance and system circulation. For fast assistance, contact us at (01420) 558993.

When your boiler ignites and then shuts down a few seconds later, it can be both frustrating and worrying. Fortunately, many of the causes are simple, safe-to-check issues that homeowners in Alton, Bordon, Whitehill, Liphook, Farnham and the GU35–GU9 areas can investigate before calling an engineer.

Quick checks you can do now

These basic steps are safe for most homeowners and often highlight the cause quickly:

• Check your room thermostat is set higher than the current room temperature.
• Confirm your programmer or smart controller is calling for heat.
• Make sure your boiler has adequate water pressure.
• Reboot the boiler using the manufacturer’s recommended procedure.

Understanding why your boiler cuts out

When a boiler cuts out after ignition, it’s usually because a safety device has detected a fault or a condition that prevents the boiler from running continuously. Modern boilers closely monitor flame stability, temperature, pressure and airflow, shutting down quickly if something seems unsafe. Homeowners across Alton and nearby areas often encounter similar symptoms during colder months when boilers work harder.

Common causes of rapid ignition shutdown

Several issues may cause the flame to catch briefly and then extinguish. While some reasons require a Gas Safe engineer, others are simple to rule out.

• Low water pressure: Most boilers need 1.0–1.5 bar when cold. If pressure drops too low, the boiler may ignite but shut down immediately.
• Blocked or restricted condensate pipe: Particularly during winter, a frozen or partially blocked condensate pipe can cause short cycling.
• Flame detection problems: A faulty flame sensor, poor grounding, or debris on the electrode can confuse the boiler into thinking the flame isn’t stable.
• Overheating: Sludge, circulation problems or a sticking pump can cause rapid temperature spikes, forcing the boiler to stop.
• Airflow or flue issues: Poor ventilation, fan faults or flue blockages can disrupt ignition sequence safety checks.

Checklist: What you can safely inspect

Use this quick checklist as a homeowner-friendly first pass:

• Is boiler pressure between 1.0 and 1.5 bar?
• Are radiators heating evenly or are some stone cold?
• Is the condensate pipe outdoors clear and not frozen?
• Are all vents and air grilles unobstructed?
• Have you recently bled radiators (which may reduce system pressure)?

When the issue involves airflow, flues or gas components

If you suspect anything involving the flue, combustion, or gas supply, avoid further attempts to restart the boiler. These components must only be worked on by a Gas Safe engineer. Homeowners in Alton and Bordon often call us when they hear unusual fan noises, notice the flame cutting out repeatedly, or find the boiler locking out with a fault code.

Could it be sludge or circulation problems?

Poor circulation is one of the most common reasons a boiler cuts out after ignition. If water cannot move around the system quickly enough, the boiler overheats and shuts down. Signs include noisy pipework, radiators warm only at the top, or the boiler cycling rapidly. In older homes throughout Alton and the GU34 area, sludge buildup is especially common in systems that haven’t been flushed or treated recently.

What about ignition and flame detection?

A dirty flame sensor or worn ignition electrodes can allow the boiler to light briefly but shut down because the control board cannot verify a stable flame. While you cannot safely access these components yourself, it’s useful to know when describing symptoms to a Gas Safe engineer.

How weather can play a role

Cold snaps in Bordon, Whitehill and surrounding areas often lead to frozen condensate pipes. This is one of the simplest issues to identify. If your boiler cuts out and you hear gurgling or see condensate backing up, gently warming the external condensate pipe may restore normal operation. If the pipe repeatedly freezes, it may need rerouting or insulation.

Preventing the issue from returning

Once you’ve restored heat, consider steps that reduce the chance of further problems:

• Have your boiler serviced annually.
• Check condensate pipe insulation.
• Top up corrosion inhibitor every few years.
• Consider a magnetic filter if you don’t already have one.
• Keep flue terminals clear of debris and vegetation.

Next steps if the problem continues

If your boiler cuts out repeatedly or won’t stay running, professional diagnosis is the safest option. For fast assistance from a Gas Safe engineer, contact (01420) 558993.

When your heating suddenly stops circulating properly, it is easy to assume the boiler is to blame. However, many issues in homes across Bordon, Whitehill, Liphook, Alton and Farnham are actually caused by pump or motorised valve faults. This guide explains the signs of failure, simple checks you can safely do and when it is time to call for expert support.

Quick checks you can do now

Before diving deeper, there are a few simple diagnostic steps that often point you in the right direction without needing tools.

• Check that the programmer or thermostat is calling for heat.
• Verify the boiler pressure is around 1.0–1.5 bar.
• Ensure the pump’s fused spur switch is turned on.
• Listen for vibration or humming from the pump body.
• Feel pipework on both sides of the pump to see if heat is moving.

Understanding the signs of a central heating pump not working

The pump is responsible for pushing heated water around your radiators and hot water system. When it starts to fail, typical symptoms appear gradually. Homeowners in GU35, GU34 and GU9 often report the following indicators before complete failure:

• Radiators heating unevenly or staying cold upstairs.
• A noticeable increase in boiler cycling but poor heat output.
• No sound or unusual noises from the pump body.
• Pump becoming excessively hot while pipes stay cool.

How to safely check your heating pump

Most pumps allow a few simple observations without needing to dismantle anything. These are safe for a homeowner to attempt but avoid removing covers or loosening screws.

• Feel for vibration: A running pump should gently vibrate. Total silence suggests it may be seized or not receiving power.
• Check temperature of pipes: If the flow pipe is hot but the return is cold, circulation may be restricted.
• Look for speed settings: Many pumps have a switch marked 1-3. If set to 1, try increasing to 2 or 3.
• Power confirmation: Confirm the fused spur is switched on and the fuse has not blown.

Motorised valve symptoms and simple diagnostics

If your pump seems operational but heating still fails to circulate, the issue may lie with a motorised zone valve. These small valves control flow to heating and hot water circuits. A stuck or failed valve in properties around Bordon or Alton often presents with similar symptoms to a pump failure.

• Manual lever check: Most valves have a small manual lever. If it is floppy or loose, the valve may be stuck open or closed.
• Feel the valve body: It should feel warm when engaged, cool when inactive.
• Listen for movement: When your heating switches on, you should hear a small click or whir as the valve motor moves.

Checklist: When the issue may be electrical

If both the pump and valve appear motionless, it may be an electrical control issue rather than a mechanical fault.

• Programmer clock is correctly set.
• Room thermostat is turned up above current temperature.
• Hot water cylinder thermostat is calling for heat.
• Main fuse spur has not tripped.

When your diagnostics point to a genuine fault

If the pump is noisy, excessively hot, completely seized or the valve refuses to move despite your checks, the components may require repair or replacement. Pumps often fail due to worn bearings, sludge buildup or long-term wear, while motorised valves commonly suffer motor burnout or stuck internal paddles. These issues are common in older homes across Bordon and nearby towns and generally straightforward for a professional to resolve.

Preventing future pump and valve problems

Many failures can be reduced with basic system care. Regular servicing keeps your boiler and circulation components running smoothly.

• Ensure the system is flushed or chemically treated when required.
• Keep inhibitor levels topped up.
• Book annual servicing to spot early warning signs.
• Check radiators yearly for cold spots.

Next steps: if your heating still will not circulate after these checks, contact an engineer at (01420) 558993.

The key story this week: the price cap is going up – and gas is the main culprit

Ofgem has announced that the energy price cap will rise by 13% for the period 1 July to 30 September 2026. This cap affects households on standard variable and default tariffs (so, anyone who hasn’t actively moved onto a fixed deal). Ofgem’s update makes it clear the underlying driver is higher wholesale gas prices, with electricity rising less sharply.

For most homes around Bordon, Whitehill, Liphook, Alton, Farnham and Haslemere, that matters because gas still does the heavy lifting for space heating and hot water. Even though we’re heading into summer, the July–September cap sets the tone for what suppliers are charging right now—and it directly affects the baseline you’ll be working from as you prep for autumn.

What actually happened (and what the “price cap” really is)

The price cap isn’t a limit on your total bill. It’s a regulator-set limit on the unit rates (pence per kWh) and standing charges suppliers can charge customers on default tariffs, based on a typical consumption model. If you use more energy than “typical”, you pay more. Use less, you pay less.

There are two practical points homeowners often miss:

• The cap changes every three months. This one runs July to September.
• Ofgem also updates the Typical Domestic Consumption Values (TDCVs) used for presenting comparisons. That doesn’t change the physics of your home, but it can change how “typical bill” figures are communicated and how people benchmark their usage.

So the story isn’t just “prices are up”. It’s “the regulated default price for each unit of gas/electric is up”, which makes efficiency improvements and control settings suddenly worth more in £ terms.

Why it matters: summer is when you lock in the easiest savings

Most people only think about heating when it’s cold. But in places like Haslemere and Farnham—where older properties, extensions and mixed insulation standards are common—summer is when you can:

• get your boiler serviced without an emergency call-out
• tweak controls while you’re not relying on them daily
• set up hot water properly (often a year-round waste point)
• plan small upgrades (smart controls, TRVs, cylinder stats) before installers get booked solid in October

Because this cap increase appears to be driven largely by gas costs, any home that can reduce gas consumption—without sacrificing comfort—gets a bigger payback than it did a quarter ago.

The technical bit in plain English: where your heating money actually goes

When you pay for gas, you’re paying for heat measured in kWh. Your boiler then converts that chemical energy into hot water for your radiators (space heating) and taps/showers (domestic hot water, or DHW). Two things decide how much you spend:

• How many kWh you use (how leaky the home is, how long heating runs, hot water habits).
• How efficiently the boiler turns kWh into useful heat.

With modern condensing boilers, efficiency depends heavily on whether the boiler can condense. Condensing happens when the returning water from your radiators is cool enough for the boiler to reclaim heat from the flue gases. If your system runs at high temperatures all the time, the boiler condenses less and you effectively burn more gas for the same comfort.

Flow temperature: the single most common “silent” cost

Many boilers in homes across Alton and Liphook are set with a radiator flow temperature around 70–80°C because that was historically normal. But for a condensing gas boiler to spend more time in high-efficiency mode, many systems can run comfortably at 55–65°C (sometimes lower), provided radiators are sized appropriately and the home isn’t extremely draughty.

Lowering flow temperature is not about making the house cold. It’s about delivering the same heat more gently and efficiently. If you try this, do it in steps and check comfort room-by-room.

Heating controls: what you actually want them to do

Your thermostat, programmer and TRVs (radiator valves) should work together so the boiler fires only when needed. Common problems we see in Bordon and Whitehill include:

• thermostat placed in a hallway that’s cooler than living spaces (boiler runs longer than necessary)
• TRVs missing or stuck, meaning rooms overheat with no control
• hot water timed “all day” in summer when a short morning/evening heat-up is enough
• incorrect boiler “mode” settings (e.g., constant comfort preheat when not needed)

What it means financially: you can’t control the cap, but you can control kWh

A price cap rise means each wasted kWh costs more. In real terms, the “best” savings now are the ones that permanently reduce demand with minimal disruption.

Here are the areas that typically provide reliable payback for homeowners (and why):

1) Boiler service and combustion check

A proper service isn’t just a box-tick. It includes safety checks, cleaning key components where applicable, and ensuring the boiler is burning cleanly. A struggling boiler can short-cycle (lots of starts/stops), run poorly, and mask small faults that become expensive breakdowns when the first cold snap hits Farnham Park or the higher ground near Haslemere.

Cost-wise, a service is predictable. A winter breakdown is not—especially if it coincides with parts delays or a busy period.

2) System water quality: sludge, magnetic filters and balancing

If radiators have cold spots, take ages to warm up, or some rooms are always “last to heat”, your system may have poor circulation or sludge. That forces longer run times (more kWh) and can cause noisy operation and pump strain.

Two practical interventions we commonly recommend (depending on what we find) are:

• Magnetic filter maintenance (or fitting one if none exists), which captures circulating iron oxide.
• Balancing radiators, so heat is shared correctly across the house and the thermostat reaches temperature sooner.

These are not glamorous upgrades, but when gas prices rise, they become financially meaningful because you’re reducing run time and improving heat delivery.

3) Flow temp optimisation (without compromising comfort)

If your boiler is condensing-capable (most are), optimising the flow temperature can cut gas use noticeably—particularly in milder weather (which is exactly what you get in July–September, and then again in October/November when heating starts back up).

Homeowner approach: reduce the radiator flow temp by 5°C, live with it for 2–3 days, then reduce again if rooms still reach target temperature. If the house struggles on colder evenings, nudge it back up slightly. You’re aiming for the lowest temperature that still heats the home properly.

4) Hot water: fix the summer waste

Even when heating is off, hot water can be a year-round gas cost. Common waste points include:

• combi boilers keeping a comfort preheat on (hot water is faster, but you burn gas maintaining temperature)
• stored hot water cylinders set too hot, or with immersion/boiler schedules that run unnecessarily
• long hot water pipe runs in larger properties outside Alton or on the edges of Haslemere—you pay to heat pipework before water reaches the tap

Practical steps: check whether “preheat” is on; review hot water schedules; and ensure cylinder thermostats are sensible (and that the cylinder has decent insulation). For Legionella protection, stored hot water is typically kept at safe temperatures; don’t change cylinder settings blindly—get advice if you’re unsure.

What it means locally (Bordon, Whitehill, Liphook, Alton, Farnham, Haslemere)

The same cap applies nationally, but local housing stock changes how it hits:

• Bordon and Whitehill: a mix of newer developments and older homes means some households have modern controls while others still rely on basic timers. The latter group often has the fastest wins from control upgrades and balancing.
• Liphook: many properties have extensions and altered layouts over time. That commonly creates uneven heating zones—one thermostat trying to control a house that no longer behaves like “one zone”.
• Alton: a lot of family homes where hot water demand is high. Optimising DHW settings and shower efficiency can make a noticeable difference.
• Farnham and Haslemere: more period properties and larger homes where heat loss can be higher, and where radiator sizing or pipework design sometimes limits how low you can comfortably run flow temperatures. Here, draught-proofing and targeted insulation (loft hatch, suspended floors, chimney balloons where appropriate) can be as valuable as boiler tweaks.

Locally, we also see many households with a gas boiler plus secondary heating (wood burners, electric heaters). With the cap rising and electricity unit costs typically high, it’s worth checking that any electric top-up heating isn’t quietly becoming the most expensive way to stay comfortable in shoulder seasons.

What homeowners should do next (practical steps that stand up in the real world)

Check your tariff position before July hits your direct debit

If you’re on a standard variable/default tariff, you’re exposed to this cap change. It may be worth comparing fixed deals, but be careful: the “best” option depends on your usage pattern and risk tolerance. If you do nothing, your unit rates will track the cap. If you fix, you’re betting that future caps won’t fall below your fixed rate. Also check whether changing payment method affects your rates (Ofgem highlights this), and make sure your meter readings are accurate.

Do a 30-minute heating controls audit

Most households can identify quick inefficiencies by checking:

• programmer schedules (heating and hot water)
• thermostat target temperature (avoid creeping it up “just because”)
• TRVs: are bedrooms cooler than lounges? Are unused rooms turned down?
• combi preheat/comfort mode: on or off, and do you actually need it?

If you’re not certain what you’re looking at, take photos of the controller and boiler display and get professional guidance—incorrect settings can waste energy or affect hot water performance.

Book servicing and small remedial work in summer

In our experience, homeowners in Farnham and Haslemere who wait until the first cold week often end up with limited appointment choice. Summer is when you can sort:

• annual service and safety checks
• noisy pumps/valves before they fail
• stuck TRVs
• system pressure issues and small leaks
• filter cleaning and inhibitor checks

If you’re considering a heat pump later, start with the “boring” prep now

The price cap story is about gas today—but many households in Alton, Liphook and surrounding villages are still weighing up heat pumps. If that’s you, the best first steps usually aren’t the heat pump itself. They’re the foundational measures: insulation, draught-proofing, radiator upgrades where needed, and lower-temperature heating readiness. Those steps reduce required heat output and make any future system cheaper to run.

The bottom line: higher unit prices make efficiency upgrades more valuable

Ofgem’s 13% rise is a reminder that household energy costs are still being pushed around by wholesale gas markets. You can’t control that volatility, but you can control how much energy your home needs to stay comfortable. The homes that feel this least will be the ones with well-set controls, clean and balanced systems, sensible flow temperatures, and heating that’s maintained before it becomes an emergency.

If you’d like Embassy Gas to check your boiler setup, optimise your heating controls or book a service in Bordon, Whitehill, Liphook, Alton, Farnham or Haslemere, call (01420) 558993, email helpdesk@embassygas.com or book online at https://www.embassygas.com/book.