Troubleshooting
Why Is My Refrigerator Not Cooling? Causes and What to Check
By Jason B ·
A refrigerator that has drifted above 40°F is a food-safety problem, and in July in Las Vegas it becomes one quickly. Kitchens warm up, garage refrigerators sit in triple-digit air and the compressor loses its margin. Before you call anyone, a few checks take ten minutes and sometimes solve the problem outright.
Five checks before you book a repair
- Temperature setting. Cleaning or a bumped panel can move the dial. Set the fresh-food side to about 37°F and the freezer to 0°F, then wait a few hours before judging.
- Door seal. Close a dollar bill in the door. If it slides out freely, the gasket is not sealing and warm air is leaking in.
- Condenser coils. On many models they sit behind the bottom grille or on the back. If they are furred with dust, airflow is blocked. Unplug the unit and vacuum them.
- Fans. With the door open and the door switch pressed, you should hear the evaporator fan in the freezer. Silence can mean a failed fan.
- Frost. Heavy ice on the freezer back panel suggests a defrost fault, which can choke airflow to the fridge side.
What the symptoms usually mean
| What you see | Likely cause |
|---|---|
| Freezer cold, fridge warm | Failed evaporator fan, iced coil or stuck damper |
| Both warm, compressor silent | Start relay, overload or control board |
| Both warm, compressor running hot | Dirty condenser, failed condenser fan, or a sealed-system problem |
| Cold, then warm every few hours | Defrost heater or thermostat failure |
| Water pooling inside or beneath | Clogged defrost drain, which often accompanies a defrost fault |
Why summer makes it worse
A refrigerator is designed around an ambient temperature in the 70s. A garage unit in 110°F air, or a kitchen with sun on the appliance, makes the compressor run almost constantly. Add dust on the coils and it overheats. If your refrigerator has begun to struggle during a heat wave, cleaning the coils and giving the unit some clearance often restores performance. If the garage itself is the problem, moving the refrigerator or shading the area helps.
Food safety
Keep the doors closed. Food in a closed refrigerator stays safe for about four hours after cooling stops; a full freezer holds temperature for around 48 hours, half a freezer for about 24. Discard perishables that have been above 40°F for more than two hours.
When to call
Call if the fan is silent, the compressor clicks but does not start, there is heavy frost, or temperatures do not recover after cleaning the coils. We diagnose on site, quote the repair in writing and credit the $85 diagnostic toward it. Premium built-in refrigerators, such as Sub-Zero, have two separate cooling systems, so a warm fresh-food section does not necessarily mean the freezer side has a problem too. Please avoid repeated resets or breaker flips; that can turn a small part replacement into a much larger repair.