Freezer temperature is incorrect and the display shows E04.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety first: Disconnect power before removing freezer panels or drawers.
Steps to check:
- Access the sensor: Remove freezer drawers and the rear interior panel (evaporator cover). The freezer sensor is usually clipped to the evaporator or mounted on the rear wall.
- Inspect wiring: Check the sensor harness for cuts, pinched sections, or ice damage. Ensure the connector is fully seated.
- Test the sensor: With the sensor unplugged, measure resistance and compare to the Thermador NTC chart for the current temperature. Replace if open, shorted, or significantly out of range.
- Reassemble carefully: After replacing the sensor, reinstall the evaporator cover and drawers, ensuring no wires are pinched.
When to seek service: If the sensor tests correctly and wiring is intact, the main control board may be defective and should be evaluated by a professional.
Repair Difficulty
Required Part
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