Refrigerator Compressor Not Working – Causes and Fixes

What Does a Refrigerator Compressor Do?

The compressor is the motor that pumps refrigerant through the cooling system.
It compresses the gas, allowing heat to escape and cold air to circulate inside the fridge.

If the compressor fails, the entire cooling process stops.

Signs Your Refrigerator Compressor Is Not Working

Look for these common symptoms:

• Refrigerator is warm but the light is on

• Freezer not freezing at all

• No humming or vibration from the back

• Clicking sound every few minutes

• Compressor is extremely hot to touch

• Fridge runs but never cools

Common Reasons a Refrigerator Compressor Stops Working

1. Power Supply Problems

Sometimes the issue is not the compressor itself.

Possible causes:

• Loose power cord

• Faulty wall socket

• Tripped circuit breaker

• Damaged extension cord

Fix:
Plug another appliance into the same outlet.
If it does not work, the problem is electrical, not mechanical.

2. Faulty Start Relay or Overload Protector

The start relay helps the compressor turn on.
If it fails, the compressor will not start.

Symptoms include:

• Clicking noise every 2–5 minutes

• Compressor not running at all

Fix:
Unplug the fridge.
Remove the relay from the compressor pins.
Shake it gently.
If it rattles, it is likely defective.

Start relays are inexpensive and easy to replace.

3. Dirty Condenser Coils

Dust-covered coils make the compressor overheat.
When this happens, the compressor may shut down automatically.

Fix:
Unplug the refrigerator.
Locate the coils at the back or bottom.
Clean them using a brush or vacuum.

Do this every 6 months to prevent future issues.

4. Thermostat or Temperature Control Failure

If the thermostat is defective, it may not signal the compressor to start.

Signs include:

• Fridge stays warm even after adjusting temperature

• Compressor remains silent

Fix:
Turn the thermostat knob slowly.
If you hear no click, it may need replacement.

5. Compressor Overheating

An overheating compressor can shut off for safety.

Causes include:

• Poor ventilation

• Dirty coils

• High room temperature

Fix:
Ensure proper airflow around the fridge.
Keep at least a few inches of space from the wall.
Clean coils thoroughly.

6. Internal Compressor Failure

This is the most serious cause.

Symptoms:

• Compressor is silent or extremely hot

• Relay and power supply are working

• Refrigerator is completely warm

Fix:
Internal compressor repair is not DIY-friendly.
Replacement requires specialized tools and refrigerant handling.

Step-by-Step Troubleshooting Checklist

1. Unplug the refrigerator

2. Check power outlet and cord

3. Listen for clicking sounds

4. Inspect and replace start relay if needed

5. Clean condenser coils

6. Allow compressor to cool for 1 hour

7. Plug back in and observe

If the compressor still does not start, professional service is required.

When to Call a Technician

Call a professional if:

• Compressor is completely dead

• Fridge is under warranty

• You smell burning or see sparks

• Compressor replacement is needed

Compressor replacement is costly and sometimes not worth it for older refrigerators.

Is It Worth Replacing the Compressor?

Consider replacement if:

• Refrigerator is less than 5–7 years old

• Brand offers compressor warranty

• Overall condition is good

Consider buying a new fridge if:

• Refrigerator is very old

• Repair cost is more than 50% of a new unit

• Energy efficiency is poor

How to Prevent Compressor Problems in the Future

• Clean condenser coils regularly

• Avoid overloading the refrigerator

• Maintain proper ventilation

• Use a voltage stabilizer if power fluctuations are common

• Do not unplug and replug frequently

A refrigerator compressor not working does not always mean disaster.
Many issues are simple, affordable, and fixable at home.

Start with basic checks.
Move step by step.
Know when to stop and call a professional.

Proper maintenance can extend your refrigerator’s life by years.

Read More:

Refrigerator not turning on: How to fix it

How to fix a refrigerator tripping the breaker

How to fix refrigerator error codes

How to reset refrigerator temperature settings

How to fix a refrigerator door alarm