If your fridge freezer never seems to switch off, it is not just annoying—it can be expensive and a sign of a problem. Constant running may indicate the appliance is struggling to maintain temperature, which puts extra strain on the compressor and other components.
Common causes
Dirty condenser coils
Dust, pet hair, and grime on the coils at the back or underneath the fridge reduce heat dissipation. The compressor works harder and longer to maintain cold temperatures.
Professional cleaning costs £50–£100.
Door seals not airtight
Even small gaps in the door gasket allow warm air in. The fridge compensates by running continuously.
Replacement gaskets usually cost £50–£120.
Temperature setting too low
Sometimes the solution is simple. If the fridge or freezer is set colder than needed, it will never stop running.
Adjusting the thermostat solves the issue immediately.
Blocked airflow or fan issues
If vents or fans are obstructed, cold air does not circulate properly, forcing the compressor to run non-stop.
Repairing or cleaning fans costs £80–£200.
Signs that constant running is serious
- Food is not cold despite the compressor running
- Noise levels are higher than normal
- Energy bills increase noticeably
- Frost builds up quickly inside the freezer
Related problems
- Fridge not cooling properly
- Fridge freezer temperature fluctuations
- Condenser coil issues and repair costs
Get a repair quote
A qualified engineer can check coils, fans, and seals to restore normal operation and save energy.
Visit our homepage to get free local repair quotes.