If your heating randomly switches off overnight, it can leave you shivering in the early hours and wondering what’s gone wrong. In Selborne (GU34), older homes often have thermostats placed in draught-prone spots or near windows, leading to misreadings and unexpected cut-outs. Before you panic and book a full heating breakdown repair, try our practical advice tailored for properties in Selborne and nearby areas like Bordon (GU35), Alton, Petersfield and Farnham.
Why Your Thermostat Can Misread Night-Time Temperatures
Drafts and Sensor Location
Thermostats sense the air temperature close to their mounting point. If yours is sited near a window, door or cold wall, a night-time draught can trick it into thinking the room is colder than it really is. The boiler then shuts off, believing it’s reached the set limit. Check for worn seals on windows or gaps under doors in bedrooms and landing areas.
Old or Faulty Thermostat Components
Many homes in Selborne still use analogue or early digital thermostats. Over time, the internal sensor can drift or fail. You might notice erratic behaviour, such as your heating turning off at inconsistent temperatures. If your thermostat is over 10 years old or shows signs of wear, consider upgrading to a more reliable model.
Incorrect Programming or Settings
Modern thermostats allow for complex schedules, but an unintended programme can lead to overnight shutdowns. A simple typo in the timer settings could mean the heating is set to switch off at midnight, only to restart at dawn. Double-check your timer and temperature hold functions to ensure they match your routine.
Step-by-Step Troubleshooting for Selborne Homeowners
- Inspect for Draughts: Walk around the ground and first floor at night with a lit candle. Watch for flickers near windows, doors or skirting boards that indicate air movement.
- Move or Shield the Thermostat: If possible, fit a simple draught shield or move the thermostat to a more central wall away from cold spots.
- Replace Batteries: Low batteries in a wireless thermostat can cause false readings. Swap them out annually to stay on the safe side.
- Reset the Thermostat: Follow the manufacturer’s instructions to revert to factory settings. Reprogram your desired schedule so you know exactly when the heating will run.
- Check Radiator Balance: Cold radiators can trick the thermostat if they’re far away. Bleeding radiators and balancing valves helps distribute heat evenly.
When to Call a Gas Safe Engineer
After you’ve ruled out obvious draughts and programming issues, persistent cut-outs may point to deeper boiler or controls faults. Low system pressure, a failing motorised valve or a faulty PCB can all cause night-time shutdowns. If you’re not comfortable diagnosing these technical parts, it’s best to call a qualified professional.
Our local Gas Safe engineers cover heater repairs, boiler cover plans and emergency call-outs across Selborne, Bordon and beyond. We’ll inspect your boiler controls, check system pressure and swap out any defective parts to restore reliable night-time heating.
Preventative Measures to Keep Your Heating Running Smoothly
- Annual Boiler Servicing: Book a comprehensive boiler servicing visit to catch issues early and maintain efficiency.
- Thermostat Upgrade: Installing a modern, programmable or smart thermostat can eliminate misreadings and let you adjust settings via an app.
- Home Insulation: Improve loft and cavity wall insulation to stabilise indoor temperatures and reduce draughts that fool your thermostat.
- Radiator Care: Bleed and balance radiators each season so heat reaches every room evenly, preventing cold spots around your thermostat.
- Consider Replacement: If your boiler is over 15 years old, explore a new boiler installation to benefit from improved controls, better efficiency and peace of mind.
Frequently Asked Questions
Q: Why does my heating only cut out at night?
A: Night-time drafts, thermostat misplacement or incorrect schedules often explain overnight shutdowns. Cooler air near a window or a midnight off-setting in the programme can trick the sensor.
Q: Can I relocate my thermostat to improve readings?
A: Yes. Moving it to a central, draught-free wall away from doors, windows and direct sunlight will give more accurate room temperatures.
Q: How often should I get my boiler serviced?
A: We recommend annual boiler servicing to ensure safe and efficient operation, reduce breakdowns and keep warranties valid.
If you need help with your heating or boiler, our local engineers are here to help. Call us on (01420) 558993 or book online at embassygas.com/book.
Written by Embassy Gas — your local heating experts covering Selborne, Bordon, Alton, Petersfield and surrounding areas.