Dimplex Humidity Control / Sensor or Control Fault

Humidifier runs continuously and over-humidifies the room

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

Faulty humidity sensor reading low, Sensor blocked or placed in wrong airflow, Stuck relay on main PCB

Safety: Unplug the unit before accessing internal components.

Steps:

Verify the humidity setpoint is not set to maximum. Adjust to a moderate level (e.g., 50%).
Ensure the humidity sensor is not covered by dust or blocked by objects. Clean gently if needed.
If the unit continues to run regardless of humidity, test or replace the humidity sensor module.
If replacing the sensor does not help, the main PCB relay or control logic may be stuck on; replace the main control PCB.

Medium 3/5

Humidity Sensor Module

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