What does it mean when a fridge is freezing food?
It means part or all of the fridge compartment is colder than 0 °C. A fridge compartment normally runs at 3 to 5 °C.
- Freezing in one spot: food is touching the back wall or sitting in front of the air vent.
- Freezing everything: the control is no longer switching the cooling off.
- Freezing with ice build-up: damp air or trapped defrost water is freezing inside.
Common causes of a fridge freezing food
The most common causes are a setting that is too cold and food placed against the back wall or air vent.
At a glance
| Cause | Typical sign | Who fixes it |
|---|---|---|
| Setting too cold | Light freezing after a setting change | You can check this |
| Food against back wall or vent | Frozen items in one spot | You can check this |
| Leaking door seal | Frost and droplets inside | You can check this |
| Failed thermostat | Compressor never stops | Technician |
| Failed sensor or control board | Freezes on the correct setting | Technician |
| Damper stuck open | Freezing near the air vent | Technician |
- 1
The temperature is set too cold
You can check thisThe control sets how cold the compartment gets. On most dial controls a higher number means colder. The sign is light freezing after the dial was moved or a fast cool mode was selected.
- 2
Food is touching the back wall or the air vent
You can check thisThe back wall and the air outlet are the coldest places in a fridge. The sign is frozen items in one spot while the rest stays normal. Keep food a few centimetres clear.
- 3
The door seal is leaking
You can check thisThe seal keeps warm, damp air out. A leaking seal makes the fridge run longer, and the moisture freezes on the back wall. The signs are frost, water droplets and a door that closes without grip.
- 4
The thermostat has failed
TechnicianA mechanical thermostat switches the compressor off when the fridge is cold enough. Worn contacts stick closed and the compressor never stops. The sign is a dial that changes nothing. A technician replaces the thermostat.
- 5
The temperature sensor or control board has failed
TechnicianElectronic fridges use a sensor, called a thermistor, and a control board instead of a thermostat. A sensor that reads too warm, or a stuck board relay, keeps the cooling on. The sign is freezing on the correct display setting. A technician tests and replaces the faulty part.
- 6
The air damper is stuck open
TechnicianOn a frost-free fridge the damper controls how much freezer air enters the fridge. The sign of a damper stuck open is food freezing near the vent while the fan runs. A technician replaces the damper.
What you can safely check yourself
You can check all of this without opening any panel. Switch off and unplug at the wall before touching anything behind the fridge.
- Measure the real temperaturePut a fridge thermometer in a glass of water on the middle shelf. Read it after 8 hours with the door closed.
- Reset the controlTurn the dial to the middle or set the display to 4 °C. Switch off any fast cool mode.
- Move the foodKeep everything clear of the back wall and the air vent.
- Test the door sealClose the door on a strip of paper. It should grip on all four sides.
- Wait 24 hoursA fridge needs a full day to settle after any change.
When to stop and call a technician
Stop and call a technician if food still freezes on the warmest setting after 24 hours. Stop if the compressor never switches off, if you smell burning, if the fridge trips the power or if water is near the plug or wiring. Do not open the thermostat housing, the control board or the sealed refrigeration system.
Still having trouble with your fridge?
Our technician comes to your home, usually the same day. The R450 call-out falls away if you go ahead, and you get a fixed price in writing before any work starts.
How a technician diagnoses a fridge that freezes food
- Logs the temperatureA probe thermometer records the fridge temperature over a full cooling cycle.
- Checks the compressor cycleThe technician confirms whether the compressor switches off at the set temperature.
- Tests the thermostat or sensorA thermostat is tested for switching. A thermistor is measured against the resistance expected at its temperature.
- Checks the damper and boardThe damper is watched as it opens and closes. The board outputs to the compressor and damper are tested.
Why is my fridge freezing food on the lowest setting?
A fridge that freezes food on the lowest setting has lost temperature control. On most dials the lowest number is the warmest setting, so first check which way the dial runs. If food still freezes on the warmest setting, a control part has failed and needs a fridge repair technician.
Why is my fridge freezing up?
A fridge freezes up when moisture gets in and turns to ice. The usual sources are a leaking door seal and a door left ajar. A blocked drain hole also traps defrost water, which freezes and can cause water leaking inside the fridge. Heavy frost on a freezer back panel is a defrost fault, which shows as a warm fridge with a working freezer.
Is a fridge that freezes food worth repairing?
Repair usually makes sense when
- The fault is a thermostat, sensor, damper or door seal
- The freezer works normally
- The cabinet and liner are in good condition
Replacement is worth considering when
- The control board is no longer available for the model
- The fridge is old and has other faults as well
- The cabinet is rusted or the liner is cracked