The thermostat is the brain of your fridge freezer, controlling when the compressor starts and stops. When it fails, the fridge may become too warm, too cold, or cycle irregularly, leading to energy waste and food spoilage.
Signs of a faulty thermostat
- Fridge runs constantly without reaching the set temperature
- Temperature fluctuates unpredictably
- Compressor fails to start or starts intermittently
- Ice buildup in the freezer or condensation in the fridge
Common causes
Wear and tear
Thermostats have moving components that degrade over time. Older fridges are more prone to failure.
Electrical faults
Loose wiring or a damaged sensor can make the thermostat give incorrect readings.
Incorrect installation
After replacement or maintenance, if the thermostat is reinstalled incorrectly, the fridge may not respond properly to temperature changes.
Repair options
Thermostat replacement typically costs between £60–£150. A certified engineer will test temperature readings before replacing the part to confirm it is the source of the problem.
Related problems
- Fridge freezer temperature fluctuations
- Fridge not cooling properly
- Fridge freezer running constantly
Get a repair quote
Professional diagnosis ensures the thermostat is replaced only when necessary and restores safe, consistent operation.
Visit our homepage to get free local repair quotes.