A fridge not cooling means either the freezer is still cold and cold air is not reaching the fresh food section or both sections are warm and the entire cooling circuit has failed and each path leads to a different cause and a different repair. Knowing which situation you face saves time, money and a fridge full of spoiled food.
Food safety in a warm fridge deteriorates fast. The Australian food safety standard recommends keeping refrigerated food at or below 5°C and once a fridge rises above that, bacterial growth accelerates within hours. Before you assume the worst, walk through this guide. Most cooling failures come down to a small number of causes and several of them are fixable without calling anyone.
Why is my fridge not cooling?
A fridge stops cooling for one of two reasons such as cold air production has failed or cold air production is fine but distribution inside the fridge has broken down. The fastest way to work out which problem you have is to open the freezer. If the freezer feels cold but the fridge section feels warm, the cooling system still works and the fault is in airflow. If both sections feel warm, the cooling circuit itself has broken down and the fault is more serious.
Start with three free checks before opening any panels. Confirm the power cord is firmly plugged in. Check that the circuit breaker for the kitchen has not tripped. A tripped breaker cuts power to the fridge while the internal light still flickers on residual current, giving a false impression that the fridge is running. Verify the temperature setting has not been accidentally changed to a warmer dial position. One in five service calls gets resolved by these three steps alone.
Fridge not cooling but freezer works: What does it mean?
When the freezer stays cold, but the fridge compartment turns warm, cold air is being produced, but it cannot reach the fresh food section. The most common cause is a failed evaporator fan. This small fan sits inside the freezer and pushes cold air through the vents into the fridge compartment. When it stops working, the freezer stays cold while the fridge warms up.
Blocked air vents cause the same symptom. Food pushed against the back wall of the freezer blocks the vents that allow cold air to flow into the fridge section. Rearrange the contents and leave 2 to 3 centimetres of clearance around all vents. A failed defrost system is another common cause. When ice builds up on the evaporator coils, it blocks airflow completely, warming the fridge side while the freezer remains cold.
Fridge and freezer both warm: What does it mean?
When both sections lose cooling at the same time, the entire refrigeration circuit has broken down. The three most common causes are compressor failure, a refrigerant leak or a failed start relay. The compressor is the pump that drives refrigerant through the system; if it stops, no cooling happens anywhere in the fridge. A refrigerant leak depletes the gas that absorbs heat, leaving both sections unable to maintain temperature. A failed start relay prevents the compressor from starting, producing a clicking sound every few minutes as the system tries and fails to restart. These faults need a licensed technician. Refrigerant handling in Australia requires an ARCtick licence. Attempting to recharge or repair a sealed system without certification is illegal and unsafe.
What are the common causes of a fridge not cooling?
The common causes of a fridge not cooling include dirty condenser coils, blocked air vents, a faulty evaporator vent, a failed start relay and a thermostat fault. These causes need to be checked to prevent any unintentional accidents.
9 common causes of a fridge not cooling are listed below.
1. Dirty condenser coils
2. Blocked air vents
3. Faulty evaporator fan
4. Failed start relay
5. Thermostat fault
6. Refrigerant leak
7. Damaged door seal
8. Compressor failure
9. Control board fault
1. Dirty condenser coils
Dirty condenser coils sit at the back or bottom of the fridge and release heat from the refrigerant into the surrounding air. Dust and pet hair accumulate on the coils over time, trapping heat inside the system. The compressor works harder trying to release heat it cannot shed and the fridge gradually loses its ability to reach the correct temperature. Clean the coils with a vacuum brush attachment once a year. This single step prevents more cooling failures than any other maintenance task.
2. Blocked air vents
Air vents inside the fridge and freezer circulate cold air evenly throughout both compartments. Food packaging pushed against these vents stops circulation and creates warm pockets inside the fridge. Check all vents along the back wall and between compartments and pull all food items at least 2 centimetres away from the vent openings.
3. Faulty evaporator fan
The evaporator fan circulates cold air from the evaporator coils through both the freezer and the fridge compartment. When the fan motor burns out or the blade becomes ice-bound, cold air stays trapped in the freezer section while the fridge warms up. Open the freezer and listen for where a working evaporator fan produces a steady airflow sound. Silence or a squealing noise points to a failing fan motor.
4. Failed start relay
The start relay sits on the side of the compressor and gives it the electrical kick it needs to start each cooling cycle. When the relay fails, the compressor tries to start, fails and clicks off. Repeating this every few minutes without ever reaching full operation. Shake the relay gently; a rattling sound inside confirms it has failed. A replacement start relay costs very little and restores full cooling in most cases where the compressor itself is intact.
5. Thermostat fault
The thermostat monitors the internal temperature and signals the compressor to switch on and off to maintain the correct setting. A faulty thermostat sends incorrect signals, either running the compressor continuously until the fridge freezes food or stopping the compressor entirely so the fridge never cools. A technician tests the thermostat resistance to confirm whether replacement is needed before touching any other component.
6. Refrigerant leak
Refrigerant is the gas that absorbs heat from inside the fridge and releases it outside through the condenser coils. A leak in the sealed system reduces refrigerant levels until the fridge loses its ability to cool at all. Signs of a refrigerant leak include both sections warming gradually over days, an oily residue near the compressor and a hissing sound near the back of the fridge. Only a licensed refrigeration technician repairs a refrigerant leak legally in Australia.
7. Damaged door seal
A cracked or loose door seal allows warm room air to enter the fridge continuously, forcing the compressor to run constantly, trying to compensate. Over time, this extra strain damages the compressor and raises electricity bills. Test the door seal by closing the door on a piece of paper. If it slides out without resistance, the seal no longer creates an airtight barrier and needs replacing.
8. Compressor failure
The compressor is the heart of the refrigeration system. It pumps refrigerant through the sealed circuit and drives the entire cooling process. A failed compressor produces no cooling at all in either section. Signs include the fridge running silently with no compressor hum, both sections warming to room temperature or a loud single click when the fridge attempts to start a cooling cycle. Compressor replacement is a major repair. A technician assesses whether repair or replacement of the appliance is the better investment based on the fridge’s age and value.
9. Control board fault
Modern refrigerators use an electronic control board to regulate the compressor cycle, fan operation, temperature sensors and defrost timing. A faulty control board produces erratic symptoms such as intermittent cooling, temperature fluctuations, display errors or complete cooling failure with no obvious mechanical cause. A technician uses specialist diagnostic equipment to confirm a control board fault before replacing it, since the symptoms overlap with several other causes.
How to fix a fridge not cooling? Step by step
To fix a fridge not cooling, check power and the circuit breaker, check the temperature setting, inspect the door seal, clean the condenser coils and listen for the evaporator fan. These five checks in order before calling a technician. Each one takes less than five minutes and resolves a large proportion of cooling failures at no cost.
1. Check power and circuit breaker: Confirm the fridge is plugged in firmly and the kitchen circuit breaker sits in the ON position. A tripped breaker cuts all fridge power silently.
2. Check the temperature setting: Someone in the household may have accidentally turned the dial toward the warmest setting. Set the temperature to 3 to 4°C and wait 24 hours before drawing any conclusion.
3. Inspect the door seal: Run your hand around the full perimeter of the door gasket with the door closed. Feel for cold air escaping anywhere along the seal. A damaged seal causes gradual warming and is one of the cheapest repairs available.
4. Clean the condenser coils: Pull the fridge away from the wall, remove the rear access panel or bottom grille and vacuum dust from the coils gently with a brush attachment. Avoid bending or damaging the coil tubes during cleaning.
5. Listen for the evaporator fan: Open the freezer door, press the door switch manually to keep the interior light off and listen for a steady airflow sound from the back wall. No sound or a squealing noise points to a faulty evaporator fan motor.
If none of these steps restore cooling, the fault lies in a component that needs professional diagnosis, like the compressor, refrigerant system, thermostat or control board.
When to call a professional fridge repair technician in Sydney?
Four fault types require a licensed technician and cannot be safely diagnosed or repaired at home. A refrigerant leaking water requires ARCtick-certified handling such as recharging or repairing a sealed system without certification is illegal in Australia. Compressor failure requires specialist equipment to test winding resistance and confirm whether the motor has seized. Control board faults need specialist diagnostic tools to distinguish from sensor failures and thermostat faults. Evaporator fan replacement on some models requires disassembling the freezer interior, which risks damaging refrigerant lines if done incorrectly.
Our same day fridge repair Sydney team covers all Sydney suburbs.These include Fridge Repair Parramatta, Fridge Repair Ryde and Fridge Repair Auburn. Every repair begins with an accurate fault diagnosis using professional testing equipment. We identify the exact cause before recommending any work, so you never pay for parts you do not need.
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