E02
Thermador User Interface to Main Board Communication Error

Refrigerator shows E02 and may not respond correctly to temperature settings or may not cool/freezer may overcool.

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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.

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Possible Causes

Loose UI harness connection, Failed user interface (display) board, Failed main control board

How to Fix / Troubleshooting

Safety first: Disconnect power before removing any trim or control panels.

Steps to check:

  • Reset the control: Turn the unit off at the breaker for 5 minutes, then restore power. Observe if E02 reappears.
  • Inspect UI connections: Remove the front control panel/trim to access the user interface board. Check the ribbon cable or harness between the UI and the main control board. Reseat both ends.
  • Check for moisture: Look for condensation or water intrusion around the display area. Dry gently with a soft cloth and allow the area to air dry before reassembly.
  • Visual inspection: Examine the UI board for burnt components or corrosion. If present, replacement is required.

Note: If wiring is intact and E02 persists, either the UI board or main control board is defective. Diagnosis often requires Thermador service diagnostics and should be done by a professional.

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Video Guide

Repair Difficulty

Hard 4/5

Required Part

User Interface Board
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