How to Fix / Troubleshooting

Safety first: Avoid touching metal surfaces with wet hands in very cold conditions.

Verify settings: Set the freezer to a warmer setting and wait 12 hours. If temperature does not change, the control may not be responding.
Test cabinet sensor: Access and test the cabinet NTC sensor as in the E1 scenario. Replace if resistance is out of range.
Inspect wiring: Check the sensor harness for shorts (insulation rubbed through, wires touching) which can make the control think the freezer is warmer than it is.
Observe compressor run time: If the compressor runs nearly 100% of the time regardless of temperature, the control board relay may be stuck.
Replace control components: Replace the temperature sensor first. If overcooling persists, the main control board or thermostat assembly may need replacement.

If you are not comfortable testing electronics, have a technician diagnose the control system.

Freezer is too cold; items are rock-hard and some liquids are freezing solid even at higher settings.

Possible Causes