Refrigerator Not Cooling Reasons (Troubleshooting Guide)

On this page

Quick answer
Confirm the symptom
Tools and prep
Step-by-step troubleshooting
Common causes table
Parts matching
When to call a pro
FAQ
Related guides

Quick answer

Check the temperature settings, ensure the condenser coils are clean, and verify the door seals are intact. If the compressor is not running, unplug the fridge for 30 minutes to reset it.

Confirm the symptom

Fridge compartment is warm to the touch
Food is spoiling faster than normal
No cold air coming from vents
Freezer is working but fridge is not
Refrigerator makes no cooling sounds

Tools and prep

Screwdriver set
Thermometer
Vacuum with brush attachment
Multimeter (optional)
Work gloves
Turn off fridge power before inspecting internal components
Clear space around the fridge for access

Step-by-step troubleshooting

Check Temperature Settings
Do: Verify the temperature settings on both the fridge and freezer compartments.
Observe: Settings should be 37°F (3°C) for fridge and 0°F (-18°C) for freezer.
Means: Incorrect settings can cause improper cooling.
Next: Adjust settings if needed and wait 24 hours to see if cooling improves.
Inspect Door Seals
Do: Close the door on a piece of paper and try to pull it out.
Observe: A strong resistance means the seal is working; weak resistance means it's damaged.
Means: Poor seals let cold air escape, reducing efficiency.
Next: Replace door gaskets if they are torn or warped.
Clean Condenser Coils
Do: Locate and clean the condenser coils (usually at the back or bottom of the fridge).
Observe: Coils should be free of dust and debris.
Means: Dirty coils reduce cooling efficiency.
Next: Use a vacuum to clean coils and check for improvement.
Check Compressor Operation
Do: Listen for a humming sound from the compressor when the fridge is plugged in.
Observe: Compressor should run periodically; silence may indicate a failure.
Means: A non-running compressor prevents cooling.
Next: Unplug the fridge for 30 minutes and plug it back in to reset.
Test Evaporator Fan
Do: Open the freezer and check if the evaporator fan is spinning.
Observe: Fan should spin freely without obstruction.
Means: A stopped fan blocks cold air circulation.
Next: Clean or replace the fan if it's stuck or damaged.
Verify Thermostat Function
Do: Use a thermometer to check if the fridge is maintaining the correct temperature.
Observe: If the temperature is not stable, the thermostat may be faulty.
Means: A faulty thermostat can't regulate cooling properly.
Next: Replace the thermostat if it's not functioning correctly.
Check for Frost Buildup
Do: Inspect the evaporator coils for excessive frost or ice.
Observe: More than 1/4 inch of ice indicates a defrost system issue.
Means: Frost buildup insulates coils and hinders cooling.
Next: Defrost manually or check the defrost timer and heater for issues.
Inspect Start Relay
Do: Test the start relay with a multimeter if the compressor doesn't start.
Observe: A clicking sound when the fridge cycles on may indicate a bad relay.
Means: A failed relay prevents the compressor from starting.
Next: Replace the start relay if it's defective.

Common causes

Cause	Likelihood	Difficulty	Part often needed
Dirty condenser coils Dust and debris reduce heat dissipation, causing the fridge to work harder.	Common	Easy	None
Faulty door seal Air leaks from gaps in the seal force the fridge to compensate by running longer.	Common	Easy	Door gasket
Incorrect temperature settings Settings that are too high prevent proper cooling.	Common	Easy	None
Compressor failure The compressor is responsible for circulating refrigerant; failure stops cooling.	Sometimes	Hard	Compressor
Evaporator fan motor failure A stopped fan prevents cold air from circulating into the fridge compartment.	Sometimes	Medium	Evaporator fan motor
Thermostat malfunction A faulty thermostat can't regulate the cooling cycle properly.	Sometimes	Medium	Thermostat
Defrost system failure A malfunctioning defrost timer or heater causes ice buildup on coils.	Sometimes	Medium	Defrost timer/heater
Refrigerant leak Low refrigerant levels prevent proper cooling; often requires professional service.	Rare	Hard	Refrigerant and repair kit
Start relay failure The relay is needed to start the compressor; failure stops the cooling process.	Rare	Medium	Start relay

Parts matching

Common parts needed for refrigerator cooling issues include:

Door gasket for sealing leaks
Evaporator fan motor for air circulation
Thermostat for temperature control
Start relay for compressor activation
Defrost timer/heater for frost prevention

Always purchase OEM or high-quality replacement parts for compatibility and durability.

When to call a professional

If the compressor doesn't run after unplugging and resetting
If you suspect a refrigerant leak (requires specialized tools)
If the fridge is under warranty and you don't want to risk voiding it
If you're unsure about electrical components or refrigerant handling
If the problem persists after trying all basic troubleshooting steps

FAQ

How often should I clean my refrigerator's condenser coils?

Clean the condenser coils every 6–12 months to maintain efficiency and prevent overheating.

Can a refrigerator cool without a working evaporator fan?

No, the evaporator fan circulates cold air from the freezer to the fridge compartment. Without it, the fridge won't cool properly.

Why is my fridge making a clicking noise but not cooling?

A clicking noise often indicates a failed start relay or compressor. Test the relay first before replacing the compressor.

Is it worth repairing an old refrigerator that isn't cooling?

Consider the age and cost of repairs. If the fridge is over 10 years old, replacement may be more cost-effective.

How can I tell if the thermostat is faulty?

If the fridge isn't cooling but the freezer is working, the thermostat may be malfunctioning. Use a thermometer to verify temperature inconsistencies.