Appliance Repair HubFind · Fix · Decode

Fridge freezer

Freezer not freezing? 3 likely causes

Check the thermostat, door seal and evaporator fan.

Symptom: Food thawing in the freezer · Typical cost: £90–£230.

Always switch off and unplug the appliance before inspecting it. Never work on gas appliances or fixed electrical wiring yourself — call a Gas Safe registered engineer or a qualified electrician.

Likely causes, most common first

  1. 1

    Frost build-up / defrost fault

    DIY: moderate

    The evaporator is iced over.

    The fix:Defrost and replace the defrost heater/thermostat.

  2. 2

    Door seal damaged

    DIY: easy

    Warm air leaks in.

    The fix:Replace the seal.

  3. 3

    Failed start relay or compressor

    Engineer job

    The compressor can’t run.

    The fix:Replace the relay/compressor.

When to call an engineer

  • You are not comfortable working on the appliance, or the fix involves electrics or gas.

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Frequently asked questions

How much does it cost to fix a fridge freezer problem like this?

£90–£230.

Is it safe to keep using it?

If you can see leaks, smell burning, or the appliance is tripping the electrics, stop using it and unplug it. For minor faults without those signs it is usually safe to leave it off until you can diagnose it. Always switch off and unplug the appliance before inspecting it. Never work on gas appliances or fixed electrical wiring yourself — call a Gas Safe registered engineer or a qualified electrician.