How to Fix a Fridge That Is Not Cooling Properly: 8 Common Causes

A fridge that is not keeping your food cold enough is a serious problem — food spoils faster, energy bills rise and the appliance risks a full breakdown. Before calling a technician, there are several checks you can do yourself that resolve the problem in many cases.

1. Check the Temperature Settings

The most obvious starting point. Check that the thermostat dial or digital display is set to the correct temperature:

• Fridge compartment: 2–4°C is recommended
• Freezer compartment: -15 to -18°C is recommended

Someone may have accidentally turned the dial toward a warmer setting. If the control was moved without you noticing, reset it and check again after 24 hours.

2. Dirty or Blocked Condenser Coils

Condenser coils sit at the back or underneath the fridge and release heat from the refrigerant. If coils are coated in dust and fluff, heat cannot escape efficiently, forcing the compressor to work harder and reducing cooling performance.

Fix: Unplug the fridge. Access the coils (at the back or underneath via a panel). Vacuum the coils and surrounding area with a brush attachment. This should be done every 12 months as standard maintenance.

3. Door Seal (Gasket) Failure

If the magnetic door seal is damaged, torn or no longer forms an airtight contact, warm air enters the fridge continuously. The compressor struggles to maintain temperature.

Test: Close a piece of paper in the door. If you can pull it out easily without resistance, the seal is failing. Test around the full perimeter of the door.

Fix: Replace the door gasket. This is an inexpensive repair available through the appliance manufacturer or a local parts supplier. It can usually be done without a technician.

4. Overpacking the Fridge

A fridge packed too tightly restricts cold air circulation. Cold air needs to flow around food to maintain even temperature. If your fridge is completely full, the back sections cool well but items near the front and door may be significantly warmer.

Fix: Reduce the contents or reorganise to allow air to flow. Leave a few centimetres of space at the back and do not block the air vents inside the fridge.

5. Insufficient Ventilation Around the Fridge

Fridges need space around them — particularly at the back and sides — to dissipate the heat they remove from the interior. If the fridge is pushed hard against a wall or enclosed with minimal clearance, cooling efficiency drops.

Fix: Pull the fridge at least 5–10 cm away from the wall. Ensure there is airflow above and to the sides if the fridge is in an enclosed cabinet.

6. The Fridge Was Recently Filled with Warm Food

If you have just stocked the fridge with large quantities of warm or room-temperature food (after a shop), the internal temperature will rise temporarily. A healthy fridge should recover to normal temperature within 2 to 4 hours.

Fix: Allow the fridge 4 to 6 hours to reach equilibrium before assessing performance. Store warm cooked food in smaller containers to cool faster.

7. Evaporator Fan Not Running

The evaporator fan circulates cold air from the evaporator coils throughout the fridge. If this fan fails, cold air stays near the evaporator and does not distribute evenly.

Test: Open the freezer and listen for the fan when the door switch is bypassed. If the fan is not running, it may need replacement.

Fix: This repair typically requires a technician or someone with appliance repair experience.

8. Refrigerant Leak or Low Refrigerant

If your fridge runs constantly but never reaches temperature, particularly if the freezer also fails to maintain cold, a refrigerant leak is a possibility. This is more likely in older fridges.

Signs: Oily residue near the coils or pipes, frost build-up in unusual places, compressor running continuously.

Fix: This requires a licensed refrigeration technician. Refrigerant handling is regulated under Australian law and cannot be done by unlicensed individuals.

When to Replace Instead of Repair

If your fridge is more than 10 years old and requires a refrigerant recharge, compressor replacement or evaporator repair, the repair cost often approaches or exceeds the value of a quality secondhand replacement. In that case, upgrading may be the better financial decision.

Find Quality Replacement Fridges at Oceania Appliances

At our Wetherill Park showroom, we stock a wide range of quality secondhand fridges with a 3–6 month warranty. If your current fridge cannot be economically repaired, we can help you find the right replacement at a fraction of retail cost. Free Sydney delivery. Open 7 days, 10 am to 8 pm.