Haier
Humidity Sensor Calibration / Failure
Display shows incorrect humidity readings (e.g., always 30% or always 80%) regardless of room conditions.
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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, Sensor contaminated by dust or moisture, Sensor wiring fault, PCB ADC (analog-to-digital converter) failure
How to Fix / Troubleshooting
Safety first: Unplug the unit before accessing internal components.
- Verify with external hygrometer: Compare the unit’s reading with a separate, known-good hygrometer.
- Clean sensor: Gently clean the humidity sensor area with compressed air or a soft brush.
- Check wiring: Ensure the sensor harness is secure and undamaged.
- Replace sensor: If readings remain inaccurate, replace the humidity sensor assembly.
- PCB replacement: If a new sensor does not correct the readings, the main PCB’s measurement circuit may be faulty and require replacement.
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Repair Difficulty
Medium
3/5
Required Part
Humidity Sensor Assembly
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