Dehumidifier shows H1 and may run continuously without reaching set humidity.

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.

Possible Causes

Contaminated humidity sensor, Sensor drift due to age, Faulty sensor calibration on PCB

Safety: Unplug the unit before cleaning or replacing sensors.

Verify with external meter: Compare the unit’s humidity reading with a separate hygrometer. If the unit reads much higher, the sensor may be dirty or drifting.
Clean sensor area: Gently blow dust away from the sensor with compressed air. Avoid touching the sensor element directly.
Replace sensor: If readings remain inaccurate or H1 persists, replace the humidity sensor module.
Board replacement: If a new sensor does not correct the reading, the main PCB may require replacement.

Medium 3/5

Humidity Sensor Assembly

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