Symptoms
- Compressor sound never stops or pauses
- Unit feels warm to the touch on the outside more than usual
- Higher than normal electric bill
- Interior temperature seems fine despite the constant running
Likely causes
- CommonPoor door seal letting cold air escapeA leaking seal forces the compressor to run nonstop trying to maintain the set temperature.
- CommonDirty condenser coils restricting heat releaseDust-caked coils make the compressor work much harder and longer to cool.
- PossibleFreezer located in a hot areaA garage or space that gets very warm makes the unit run more to compensate.
- PossibleThermostat malfunctioningA stuck or failing thermostat may never signal the compressor to stop.
What to do
- Test the door seal with the paper test around the whole perimeter.
- Unplug and clean the condenser coils, typically located on the back or bottom of the unit.
- Check the room temperature where the freezer sits; extreme heat (garages in summer) will always increase run time somewhat.
- Make sure the freezer isn't overpacked or blocking its own internal air circulation.
- Listen for the compressor cycling at all over a few hours; if it truly never stops, this points more strongly to a thermostat or refrigerant issue.
Tools and parts
- Vacuum with brush attachment
- Paper (for seal test)
Chest freezer door gasketSearch: “chest freezer lid gasket replacement”
When to call a pro
Call an appliance technician if cleaning the coils and checking the seal don't reduce run time, since the thermostat or refrigerant system may need service.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.