Homedics Humidity Control / Sensor Drift

Homedics humidifier runs continuously and will not shut off even when the set humidity is reached.

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 out of calibration, Sensor not sensing room air (blocked), Control board logic fault, Incorrect placement causing false low readings

Safety: Unplug before opening the housing.

Steps:

Verify with external hygrometer: Compare room humidity with an independent meter to confirm the unit is overshooting.
Relocate unit: Move the humidifier away from drafts, heat sources, or open windows that can skew readings.
Clean sensor: Gently clean the humidity sensor area to remove dust.
Replace sensor: If readings remain inaccurate, install a new Homedics humidity sensor module.
Control board: Persistent control issues after sensor replacement may require a new main control PCB.

Medium 3/5

Humidity Sensor Module

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