Freezer Won't Stop Running
If your freezer won't stop running, the problem could be caused by dirty condenser coils, a faulty door gasket, an incorrect temperature setting, or a malfunctioning thermostat. Before replacing any parts, inspect the most common causes listed below.
Safety Notice: Always unplug the freezer before servicing it. Avoid touching electrical components while the unit is connected to power.
Possible Causes
- Dirty condenser coils
- Damaged door gasket
- Temperature setting too cold
- Door left open or opened frequently
- Faulty thermostat or cold control
- Defective temperature sensor (thermistor)
- Failed electronic control board
- Low refrigerant or sealed system problem
1. Dirty Condenser Coils
Most Common Solution
Dust and debris on the condenser coils prevent heat from dissipating efficiently, causing the compressor to run longer in an attempt to maintain the set temperature.
What to do:
- Unplug the freezer.
- Locate the condenser coils.
- Clean the coils using a coil brush or vacuum.
- Restore power and monitor the freezer for normal cycling.
2. Door Gasket
A worn, torn, or dirty door gasket allows warm air to enter the freezer, forcing the compressor to run continuously.
What to do:
- Inspect the door gasket for cracks, tears, or gaps.
- Clean the gasket with warm, soapy water.
- Replace the gasket if it no longer seals tightly.
3. Temperature Setting Too Cold
Setting the freezer temperature lower than necessary can cause the compressor to run for extended periods.
What to do:
- Verify the temperature is set between 0°F (-18°C) and 5°F (-15°C).
- Adjust the setting if necessary.
- Allow 24 hours for the temperature to stabilize.
4. Door Left Open or Opened Frequently
Frequent door openings or a door that does not close completely allow warm air into the freezer, increasing compressor run time.
What to do:
- Make sure the door closes completely.
- Minimize the amount of time the door remains open.
- Remove any items preventing the door from sealing properly.
5. Thermostat or Cold Control
A faulty thermostat may continuously call for cooling, preventing the compressor from cycling off.
What to do:
- Adjust the thermostat and observe whether the compressor cycles normally.
- Test the thermostat for continuity if applicable.
- Replace it if it is defective.
6. Temperature Sensor (Thermistor)
The thermistor monitors freezer temperature and sends information to the control board. Incorrect readings can cause the compressor to run continuously.
What to do:
- Inspect the thermistor for damage.
- Test its resistance according to the manufacturer's specifications.
- Replace the sensor if it is defective.
7. Electronic Control Board
The control board regulates compressor operation. If it fails, it may continuously supply power to the compressor.
What to do:
- Inspect the control board for signs of damage.
- Replace the board after ruling out the thermostat and thermistor.
8. Low Refrigerant or Sealed System Problem
A refrigerant leak or sealed system failure can prevent the freezer from reaching the desired temperature, causing the compressor to run almost constantly.
What to do:
- Listen for the compressor running continuously without adequate cooling.
- Inspect for signs of an oily residue around refrigerant lines.
- Have the sealed system diagnosed and repaired by a qualified technician.
Need Help Finding the Correct Part?
If you need help identifying the correct replacement part, send us your complete freezer model number and a clear photo of the appliance identification label before placing your order. Our team will verify compatibility and help ensure you receive the correct replacement part the first time.