Challenge Humidity Sensor Circuit Error

Humidifier displays F1; fan may run but no humidification.

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

Open or shorted humidity sensor, damaged sensor cable, failed humidity sensor interface on PCB

Safety: Disconnect from mains before accessing the control panel.

Steps:

Access humidity sensor: Remove the front grille or control panel to locate the humidity sensor module near the air intake.
Inspect and reseat: Check the sensor for physical damage. Reseat its connector on the PCB.
Clean sensor: Gently remove dust with a soft brush. Avoid liquids.
Replace sensor if needed: If F1 persists, install a new Challenge humidity sensor module compatible with your model.

Medium 3/5

Humidity Sensor Module

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