E20
Gaggenau
Secondary temperature sensor fault
Dryer shows E20 and stops; may be associated with sensor for exhaust or condenser temperature.
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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
Defective secondary NTC sensor, Loose sensor connector, Damaged wiring harness, Control board sensor input failure
How to Fix / Troubleshooting
Safety first: Unplug the dryer before inspection.
- Identify secondary NTC: Consult the service manual to locate the additional NTC (often on the condenser, heat exchanger, or exhaust duct).
- Inspect and reseat connector: Ensure the sensor plug is firmly connected and free of corrosion.
- Measure resistance: Test the sensor with a multimeter at room temperature and compare to specifications. Replace if out of range.
- Check harness continuity: Verify continuity from the sensor connector to the control board. Repair any breaks.
- Control board: If sensor and wiring are good, the control board may be faulty and require replacement.
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Repair Difficulty
Medium
3/5
Required Part
Secondary NTC Sensor
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