Freezer is cold but runs almost all the time, with only occasional short off cycles.

Safety first: Unplug the freezer before testing controls or replacing any gaskets.

• Check the actual temperature: Use a thermometer to verify the internal temperature. If it is colder than the set temperature (e.g., -10°F when set to 0°F), the control may be misreading.
• Inspect the door gasket: Look for gaps, tears, or hardened sections. Close the door on a sheet of paper; if it pulls out easily, the seal is weak. Replace the gasket if needed.
• Test the thermostat: On mechanical models, check continuity across the thermostat at different dial positions. If it never opens, replace it.
• Check the thermistor: On electronic models, measure the thermistor resistance and compare it to the technical sheet. Replace it if out of range.
• Level the cabinet: Ensure the freezer is level or slightly tilted back so that the door closes firmly.