Freezer interior is too cold; food is over-frozen or ice crystals form on packaging even at moderate settings.

Safety first: Unplug the freezer before accessing controls or sensors.

• 1. Adjust temperature setting: Raise the set temperature one or two steps and monitor for 24 hours. If no change, suspect a control fault.
• 2. Mechanical thermostat models: Access the thermostat knob assembly and test the thermostat contacts with a multimeter. If it remains closed regardless of knob position, replace the thermostat.
• 3. Electronic models: Check the cabinet temperature sensor location; it should not be in direct contact with the evaporator coil. Reposition if necessary.
• 4. Test sensor resistance: Measure the NTC sensor resistance and compare to the temperature chart. Replace if out of spec.
• 5. Replace main control board: If sensor is good but the compressor never cycles off, the control board relay may be stuck. Replace the main control board.