The Short Answer
Most refrigerators stop cooling because of dirty condenser coils, a blocked air vent, a failed evaporator or condenser fan, or a defrost problem that lets ice block the airflow. If the freezer is cold but the fridge is warm, a fan or defrost issue is the most likely cause.
Start With These 5-Minute Checks
Before you assume the worst, rule out the simple stuff. These checks are safe and solve more problems than you'd think.
- Is it getting power? Make sure the light comes on and the outlet or breaker hasn't tripped.
- Check the temperature setting. Dials get bumped by groceries. The fridge should be set to 37–40°F.
- Look at the vents. Food pushed against the vents inside the fridge or freezer blocks cold air.
- Close the doors firmly. A door left slightly open lets warm air in all day.
- Listen. A quiet fridge with a warm cabinet points to a different problem than a fridge that runs nonstop.
8 Common Reasons a Fridge Stops Cooling
1. Dirty condenser coils
The coils under or behind your fridge release heat. When dust and pet hair cover them, the fridge can't cool well and runs all the time.
2. Blocked air vents
Cold air flows from the freezer into the fridge through small vents. A box or bag in front of them cuts off the flow.
3. Failed evaporator fan
This fan pushes cold air from the freezer coils into the fridge. If it stops, the freezer stays cold while the fridge warms up.
4. Failed condenser fan
Found near the compressor, this fan cools the coils. When it fails, the whole fridge struggles.
5. Defrost system problem
Frost-free fridges melt ice off the freezer coils several times a day. If the heater, sensor or timer fails, ice builds up and blocks the air.
6. Worn door gasket
A torn or flat rubber seal lets warm air in. In foggy coastal towns, gaskets dry out and crack sooner.
7. Bad start relay or compressor
A clicking sound every few minutes with no cooling often means the start relay is failing. A failed compressor is less common and more costly.
8. Faulty thermistor or control board
These parts tell the fridge when to cool. If they misread the temperature, cooling stops too early.
Match Your Symptom to the Cause
Use this table to narrow down what's going on.
| What You Notice | Most Likely Cause |
|---|---|
| Freezer cold, fridge warm | Evaporator fan or defrost problem |
| Both sections warm, fridge running | Dirty coils or condenser fan |
| Both warm, fridge silent | Power, start relay or control board |
| Clicking every few minutes | Start relay or compressor |
| Frost on the freezer back wall | Defrost heater, sensor or timer |
| Doors sweating, food spoiling fast | Worn door gasket |
Safe Fixes You Can Try at Home
- Clean the condenser coils. Unplug the fridge, pull off the bottom grille or move it out, and vacuum the coils with a brush attachment.
- Clear the vents. Move food away from the vents in both sections.
- Test the door seal. Close the door on a dollar bill. If it slides out easily, the gasket may need replacing.
- Try a manual defrost. If you see thick frost, unplug the fridge for 24 hours with the doors open and towels down. If cooling returns and then fails again in a week or two, the defrost system needs repair.
- Give it time. After any fix, wait 24 hours for temperatures to settle before judging the result.
Fridge full of food and getting warmer? Our Pacifica technicians offer same-day refrigerator repair and a 24-hour phone line.
(650) 491-1179Keep Your Food Safe While You Wait
The USDA says a refrigerator keeps food safe for up to 4 hours without cooling if you keep the door closed. A full freezer holds for about 48 hours, and a half-full one for about 24 hours.
- Keep the doors shut as much as possible.
- Use an appliance thermometer. The fridge should stay at or below 40°F.
- Throw out meat, fish, dairy, eggs and leftovers that sat above 40°F for more than 2 hours.
- Move important items to a cooler with ice if repairs will take a while.
When to Call a Technician
Call for help if the simple checks don't work, or if you notice any of these:
- The fridge clicks on and off but never cools.
- Frost keeps coming back after a manual defrost.
- A fan is silent or grinding.
- The compressor is very hot or noisy.
- You smell burning or see sparks.
Our refrigerator repair team can test each part and fix the real cause. For built-in models, see our Sub-Zero repair page, and if your fridge has failed overnight, use our emergency appliance repair line.