Why Is My Fridge Not Cooling? (6 Common Causes and What To Do)

QUEENSLAND APPLIANCE REPAIRS

A fridge that isn’t cooling properly is one of the most stressful appliance problems a Queensland homeowner can face. With our warm climate, food spoils quickly — and a fridge that’s lost its chill can mean hundreds of dollars of groceries at risk within just a few hours.

Before you start throwing out food and panicking about the cost of a new fridge, take a breath. Many of the most common causes of a fridge not cooling are surprisingly straightforward to identify, and some can even be resolved without calling a technician at all.

Here are six of the most frequent reasons a fridge stops cooling properly, and exactly what to do about each one.

How Warm Is It Actually?

It’s worth clarifying what “not cooling” means before diving in. A properly functioning fridge should maintain a temperature between 3°C and 5°C in the fresh food compartment, and around -18°C in the freezer. If your fridge feels slightly warmer than usual but food isn’t spoiling, it may just need a temperature adjustment.

If it’s significantly warm, running constantly without getting cold, or the freezer is fine but the fridge section isn’t cooling — those are signs of a genuine fault worth investigating.

Blocked or Dirty Condenser Coils

The condenser coils are responsible for releasing heat from the refrigerant as it cycles through the system. When these coils become coated in dust, pet hair, and debris — which happens gradually over time — they can’t dissipate heat efficiently, and the fridge has to work much harder to maintain its temperature. Eventually it may struggle to cool at all.

This is one of the most common and most overlooked causes of poor fridge performance, particularly in Queensland homes where dust and pet hair are a year-round reality.

What to do: The condenser coils are usually located at the back of the fridge or beneath it behind a kick plate. Unplug the fridge, pull it away from the wall, and use a vacuum cleaner with a brush attachment to carefully remove the buildup. This simple maintenance task can make a dramatic difference to cooling performance and should be done every 12 months.

A Faulty Evaporator Fan

Inside your fridge, an evaporator fan circulates cold air from the freezer section through to the fresh food compartment. If this fan stops working — due to a failed motor, an ice blockage, or a damaged blade — cold air simply won’t circulate properly. The freezer may remain cold while the fridge section warms up, which is a classic symptom of this fault.

What to look for: Open the fridge and listen — you should be able to hear the fan running. If it’s silent, or if you can hear it struggling or making an unusual noise, the fan motor may have failed. Sometimes ice buildup around the fan can physically block the blades from turning.

What to do: If ice is blocking the fan, a manual defrost may temporarily resolve the issue — unplug the fridge and leave the freezer door open for several hours to allow the ice to melt. However, if ice is repeatedly building up around the evaporator, there’s likely an underlying fault causing it (see point 4 below). A failed fan motor will need to be replaced by a technician.

A Faulty or Blocked Pump or Pump Filter

A Refrigerant Leak

Your fridge cools by circulating refrigerant — a chemical compound that absorbs heat from inside the fridge and releases it outside. If the refrigerant circuit develops a leak, there simply isn’t enough refrigerant left in the system to cool effectively, and the fridge will gradually lose its ability to maintain temperature.

Refrigerant leaks are more common in older fridges but can affect newer models too, particularly if the unit has been knocked or moved roughly.

What to look for: A fridge that’s running constantly but never getting cold, sometimes accompanied by an oily residue around the compressor or a faint chemical smell. Unlike some other faults, a refrigerant leak won’t fix itself and will progressively worsen over time.

What to do: Refrigerant handling is strictly regulated in Australia and must be carried out by a licensed technician. If you suspect a refrigerant leak, turn the fridge off and call a professional. At Queensland Appliance Repair, our technicians are fully licensed to handle refrigerant and can diagnose and repair leaks across Brisbane and Southeast Queensland.

A Defrost System Fault

Modern fridges use an automatic defrost system to periodically melt any frost that builds up on the evaporator coils. If this system fails — due to a faulty defrost heater, defrost timer, or defrost thermostat — ice will gradually accumulate on the evaporator coils until they’re completely encased in frost. At that point, airflow is blocked and the fridge loses its ability to cool.

This is an extremely common fault and one that’s often mistaken for a compressor or refrigerant problem.

What to look for: The fridge section is warm but the freezer may still feel partially cold. If you remove the back panel inside the freezer compartment, you may find the evaporator coils completely encased in ice. The fridge may also be running constantly without achieving the right temperature.

What to do: A manual defrost (unplugging the fridge for 24–48 hours with the doors open) will melt the ice and temporarily restore cooling — but if the defrost system has genuinely failed, the ice will simply build up again within a few weeks. A technician will need to identify and replace the specific component that’s failed in the defrost circuit.

A Worn Door Seal

The door gasket — the rubber seal that runs around the edge of the fridge and freezer doors — creates an airtight barrier that keeps cold air in and warm air out. In Queensland’s heat and humidity, these seals can harden, crack, or warp over time, allowing warm air to seep in constantly. The fridge then has to work continuously to compensate, and may struggle to maintain the right temperature, particularly on hot summer days.

What to look for: Close the fridge door on a piece of paper — you should feel resistance when you pull it out. If the paper slides out easily, the seal isn’t tight enough. You can also feel along the seal with your hand while the fridge is running to detect any cold air escaping.

What to do: Door seals can sometimes be improved by cleaning them thoroughly with warm soapy water, which restores some flexibility. If the seal is visibly cracked, torn, or has hardened significantly, replacement is the right solution. New door seals are a relatively affordable repair and can make a significant difference to both cooling performance and energy bills.

A Failing Compressor

The compressor is the heart of your fridge’s cooling system — it pressurises the refrigerant and drives the entire cooling cycle. When the compressor begins to fail, cooling performance deteriorates and the fridge may struggle to reach or maintain the right temperature. A completely failed compressor means the fridge won’t cool at all.

Compressor issues are more common in older fridges, and repair or replacement is one of the more significant fridge repairs in terms of cost.

What to look for: The fridge runs constantly but never gets cold. You may hear a clicking noise as the compressor repeatedly tries to start and fails, or the fridge may be unusually quiet if the compressor has stopped running altogether. The fridge and freezer will both be warm.

What to do: Compressor diagnosis and replacement is a job for a qualified technician. It’s also worth weighing the cost of compressor repair against the age of the fridge — for older machines, replacement may be more economical. Our technicians will give you an honest assessment either way.

A Note on Queensland's Climate

Brisbane and Southeast Queensland’s warm, humid climate puts extra demand on fridges compared to cooler parts of Australia. During summer, ambient temperatures in kitchens can reach 30°C or above, and fridges positioned near ovens, in direct sunlight, or in poorly ventilated spaces have to work significantly harder to maintain safe temperatures.

If your fridge is struggling particularly during summer, make sure it has adequate clearance on all sides for ventilation, isn’t positioned next to a heat source, and that the condenser coils are clean. These simple steps can prevent a lot of cooling problems before they start.

When To Call a Professional

Cleaning condenser coils and checking door seals are things most homeowners can tackle themselves. But refrigerant leaks, defrost system faults, evaporator fan replacements, and compressor issues all require a licensed, experienced technician — both for safety reasons and to ensure the repair is done correctly the first time.

Queensland Appliance Repair services all major fridge brands including Samsung, LG, Fisher & Paykel, Westinghouse, Electrolux, Haier, Bosch, and Miele across Brisbane, the Gold Coast, the Sunshine Coast, Ipswich, and surrounding Southeast Queensland areas.

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