E20
Thermador
Humidity Sensor / Humidity Control Fault (if equipped)
E20 displayed; unit may not maintain humidity properly or may run fans unexpectedly.
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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
Failed humidity sensor, Disconnected or damaged humidity sensor harness, Faulty main control humidity input, Excessive ambient humidity overwhelming system
How to Fix / Troubleshooting
Safety: Disconnect power before accessing interior sensors or control boards.
Steps:
- Check environment: Ensure the wine cooler is not installed in an extremely humid area (e.g., unconditioned basement without dehumidification).
- Locate humidity sensor: On models with humidity control, the sensor is typically mounted on the interior liner or near the evaporator.
- Inspect and reseat: Check the sensor and harness for damage. Reseat the connector at both the sensor and control board.
- Test sensor: Measure resistance or voltage output per service documentation. Replace the sensor if readings are out of spec.
- Control board: If a known-good sensor still results in E20, the main control board may be defective and require replacement.
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Repair Difficulty
Medium
3/5
Required Part
Humidity Sensor
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