H1
AEG
Humidity Sensor Calibration / Out-of-Range Error
Dehumidifier shows H1 and runs continuously without reaching set humidity
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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
Drifted humidity sensor, Sensor contaminated by dust or chemicals, Incorrect sensor placement after service, Control board calibration fault
How to Fix / Troubleshooting
Safety: Unplug the unit before accessing the sensor.
- Clean sensor area: Gently clean the humidity sensor housing with a dry brush or compressed air. Avoid touching the sensing element directly.
- Check placement: Ensure the sensor is located in the air stream, not pressed against insulation or metal surfaces.
- Compare with external hygrometer: Place an accurate hygrometer near the intake and compare readings. If the AEG unit is off by a large margin, the sensor is likely faulty.
- Replace humidity sensor: Install a new humidity sensor assembly and route wiring as original.
- Calibration / board: Some models allow service calibration; otherwise, if a new sensor does not fix H1, the main control PCB may require replacement.
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Repair Difficulty
Medium
3/5
Required Part
Humidity Sensor Assembly
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