Why Is My Refrigerator Not Cooling? 7 Common Causes

Published: April 15, 2026 · By SAVA HVAC & Appliance Repair

A refrigerator that runs but doesn't cool is one of the most stressful appliance problems — food is spoiling and the clock is ticking. The good news: in most cases, the problem is fixable, and it's often a single component. Here are the 7 most common reasons a refrigerator stops cooling, starting with the simplest.

1. Dirty Condenser Coils

Condenser coils release heat from the refrigerant. When they're coated in dust and pet hair, they can't release heat efficiently — and the refrigerator runs warm. The coils are usually located on the back or underneath the unit. You can clean them yourself with a coil brush and vacuum. If the fridge cools again after cleaning, great. If not, there's another cause.

2. Faulty Evaporator Fan Motor

The evaporator fan circulates cold air from the freezer into the refrigerator section. If this motor fails, the freezer may stay cold but the fridge won't. Open the freezer door and press the door switch manually — you should hear the fan running. If you don't, the fan motor is likely failed and needs replacement.

3. Broken Thermostat or Temperature Control Board

If the thermostat isn't reading the temperature correctly, it won't tell the compressor to run often enough. Signs include the fridge being warmer than the set temperature while the compressor runs only occasionally. This is a parts swap that a technician can diagnose and fix in one visit.

4. Worn or Damaged Door Seals

A damaged door gasket lets warm room air in constantly. The fridge runs more but can't overcome the heat gain. Test yours: close the door on a dollar bill. If it slides out easily, the seal needs replacement. Door gaskets are one of the most affordable refrigerator repairs.

5. Overloaded or Overcrowded Fridge

This one is easy to miss. A refrigerator packed too tightly doesn't allow cold air to circulate. If your fridge is stuffed to capacity, remove some items and wait 24 hours. If temperatures recover, that was the problem — and the fix was free.

6. Low Refrigerant From a Leak

Refrigerant is the substance that actually absorbs heat and cools your food. If the system has a leak, refrigerant levels drop and cooling capacity decreases. Signs include frost patterns in unusual locations, oily residue near coils, or hissing sounds. Refrigerant issues require a certified technician — this is not a DIY fix.

7. Compressor Failure

The compressor is the heart of the cooling system. When it fails, the fridge completely stops cooling. Signs: the fridge hums but produces no cold, or you hear clicking as it tries and fails to start. Compressor replacement is the most expensive refrigerator repair — in older units, it may make more sense to replace the appliance. A technician can give you an honest assessment.

When to Call a Repair Tech

If cleaning the coils doesn't fix it, or if you suspect a refrigerant leak or compressor issue — call a technician. Food safety starts at 40°F; once your fridge exceeds that, spoilage starts in 2–4 hours.