Refrigerator Runs Constantly Common Causes

Quick answer

A refrigerator running constantly is often due to a faulty thermostat, dirty condenser coils, or a failing compressor. Check the temperature settings, clean the coils, and ensure proper airflow around the unit.

Confirm the symptom

• Fridge motor runs without cycling off
• Interior temperature is not cold enough
• High electric bill increase
• Fridge feels warm at the back or bottom

Tools and prep

• Screwdriver set
• Vacuum with brush attachment
• Thermometer
• Work gloves
• Turn off fridge for safety when cleaning coils
• Unplug the refrigerator before inspecting electrical parts

Step-by-step troubleshooting

1. Check Temperature Settings
   Do: Verify the fridge and freezer temperatures are set correctly (34–40°F for fridge, 0°F for freezer).
   Observe: Temperatures outside the recommended range
   Means: Incorrect settings may cause the compressor to run constantly.
   Next: Adjust settings and wait 24 hours to see if the issue resolves.
2. Clean Condenser Coils
   Do: Locate and clean the condenser coils using a vacuum or brush.
   Observe: Dusty or dirty coils
   Means: Dirty coils reduce efficiency, making the compressor work harder.
   Next: Allow coils to dry completely before plugging the fridge back in.
3. Inspect for Air Leaks
   Do: Check the door gasket for gaps or damage using a dollar bill test.
   Observe: Bill slides out easily or gaps in the gasket
   Means: Air leaks force the fridge to work harder to maintain temperature.
   Next: Replace or repair the gasket if leaks are present.
4. Check for Obstructions
   Do: Ensure nothing is blocking the vents inside the fridge or freezer.
   Observe: Blocked airflow between compartments
   Means: Poor airflow disrupts temperature balance and causes constant running.
   Next: Rearrange items to allow proper airflow.
5. Test the Thermostat
   Do: Use a thermometer to verify the internal temperature matches the thermostat setting.
   Observe: Thermostat does not match actual temperature
   Means: A faulty thermostat can prevent the compressor from cycling off.
   Next: Replace the thermostat if it is inaccurate.
6. Listen for Compressor Issues
   Do: Listen for unusual noises from the compressor while the fridge is running.
   Observe: Loud humming, clicking, or vibrating noises
   Means: A failing compressor may run continuously without cycling.
   Next: Consult a professional if the compressor is faulty.

Common causes

Parts matching

Common parts needed for a constantly running refrigerator:

• Refrigerator thermostat
• Door gasket
• Compressor (professional replacement required)

Always purchase parts compatible with your refrigerator model.

When to call a professional

• The compressor makes loud or unusual noises
• The fridge does not cool at all after checking settings and coils
• You suspect a refrigerant leak (smell, oil stains, or hissing sounds)
• The unit is over 10 years old and requires major repairs

FAQ

Related guides

• refrigerator temperature too high
• refrigerator runs constantly common causes

Related searches: refrigerator not cooling properly, fridge running but not cold, refrigerator condenser coil cleaning, refrigerator door gasket replacement, refrigerator compressor not working, refrigerator making loud noises, refrigerator high energy bill, refrigerator thermostat problems, refrigerator air leak diagnosis, refrigerator runs constantly common causes fix