Challenge Erratic Humidity Reading / Control Instability

Dehumidifier display works but settings change by themselves or humidity reading jumps erratically.

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

Humidity sensor cable picking up electrical noise, sensor contaminated, main PCB analog-to-digital converter fault

Steps:

Relocate unit: Move away from strong electromagnetic sources (large motors, inverters, Wi-Fi routers very close by).
Inspect sensor wiring: Ensure the humidity sensor cable is not routed alongside mains power wires. Reroute if necessary.
Clean or replace sensor: Clean the sensor module and replace with a new humidity sensor module if readings remain unstable.
Replace PCB if needed: Persistent erratic behavior after sensor replacement suggests a faulty main PCB.

Medium 3/5

Humidity Sensor Module

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