Freezer runs constantly and never seems to shut off, though it may still be cold.

Safety: Unplug before cleaning or accessing components.

Steps:

• Clean condenser coils: Dust and pet hair reduce efficiency and cause long run times. Clean thoroughly.
• Inspect door gasket: Look for gaps, tears, or warped areas. Close the door on a sheet of paper; if it pulls out easily, the seal is weak. Replace the gasket if needed.
• Check ambient conditions: Very hot rooms or garages can cause long run times; ensure adequate ventilation around the freezer.
• Control and sensor: If the unit reaches very low temperatures but never cycles off, test the thermostat or thermistor and replace the faulty part. If sensors are good, replace the control board.