Refrigerator Not Running

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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 power outlet and circuit breaker first. Ensure the refrigerator is plugged in and the thermostat is set correctly. If the compressor doesn't hum, a faulty component may need replacement.

Confirm the symptom

No cooling in fridge and freezer
No sounds from the compressor
Lights may be on but no cooling
Thermostat is set to a normal temperature
Power outlet works for other devices

Tools and prep

Screwdriver (flathead and Phillips)
Multimeter (for testing electrical components)
Thermometer (to check internal temperature)
Owner’s manual (for model-specific info)
Work gloves (for safety)

Step-by-step troubleshooting

Check Power Supply
Do: Verify the refrigerator is plugged in and the outlet works. Test the outlet with another device.
Observe: Outlet powers other devices.
Means: Power supply is functional.
Next: Check the circuit breaker.
Check Circuit Breaker
Do: Locate the circuit breaker panel and ensure the breaker for the refrigerator is in the 'on' position.
Observe: Breaker is tripped or damaged.
Means: Tripped breaker may have caused a power loss.
Next: Reset the breaker and monitor the refrigerator.
Inspect Thermostat
Do: Check the thermostat settings to ensure it is set to a normal cooling temperature.
Observe: Thermostat is set correctly.
Means: Thermostat is not the issue.
Next: Listen for the compressor.
Listen for Compressor
Do: Listen closely to the back or bottom of the refrigerator for a humming or running sound.
Observe: No sound from the compressor.
Means: Compressor may not be receiving power or is faulty.
Next: Test the start relay.
Test Start Relay
Do: Unplug the refrigerator. Use a multimeter to test the start relay for continuity.
Observe: No continuity in the start relay.
Means: Faulty start relay is preventing the compressor from starting.
Next: Replace the start relay.
Check Condenser Coils
Do: Clean the condenser coils located at the back or bottom of the refrigerator to remove dust and debris.
Observe: Coils are clean and free of obstructions.
Means: Clean coils improve efficiency but may not fix a non-running issue.
Next: Test the compressor.
Test Compressor
Do: Unplug the refrigerator. Use a multimeter to test the compressor for continuity.
Observe: No continuity in the compressor.
Means: Faulty compressor may need replacement.
Next: Contact a professional technician.

Common causes

Cause	Likelihood	Difficulty	Part often needed
Power Outage or Tripped Breaker The refrigerator loses power when the circuit is interrupted.	Common	Easy	None
Faulty Start Relay The start relay sends power to the compressor; if it fails, the compressor won’t start.	Common	Easy–Medium	Start Relay
Malfunctioning Thermostat An incorrect thermostat setting or failure prevents the cooling cycle.	Sometimes	Easy	Thermostat
Dirty Condenser Coils Dust and debris reduce efficiency and can cause overheating.	Sometimes	Easy	None
Faulty Compressor The compressor is the heart of the cooling system; failure stops the entire process.	Sometimes	Hard	Compressor
Defective Temperature Control Board The board regulates temperature settings; failure disrupts cooling.	Rare	Medium	Temperature Control Board
Blocked Air Vents Obstructions prevent proper airflow between the fridge and freezer compartments.	Rare	Easy	None

Parts matching

Common parts needed for a refrigerator not running include:

Start Relay – Replaces the component that starts the compressor
Thermostat – Adjusts and maintains internal temperature
Compressor – Pumps refrigerant to cool the interior
Temperature Control Board – Regulates cooling cycles

Always refer to the owner’s manual for part compatibility with your refrigerator model.

When to call a professional

The refrigerator still doesn’t run after checking power and basic components
You hear unusual noises or burning smells from the unit
You suspect a faulty compressor or electrical issues beyond your skill level
The refrigerator is under warranty and you don’t want to risk voiding it

FAQ

Why is my refrigerator not cooling but the lights are on?

The lights being on indicates power is working, but the cooling system may have a separate issue like a faulty thermostat or compressor.

How do I know if the start relay is bad?

A bad start relay often results in the compressor not starting, with no humming sound and no cooling.

Can dirty condenser coils cause a refrigerator to stop running?

Dirty condenser coils can reduce efficiency and cause overheating, but they typically don’t stop the refrigerator from running entirely.

Is it worth replacing a faulty compressor?

Replacing a compressor is expensive and labor-intensive; consider the age and overall condition of the refrigerator before proceeding.