Frigidaire Humidity Control Failure

The dehumidifier display and buttons work, but the unit does not respond to changes in the humidity setting (runs constantly or not at all).

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, stuck relay on the main control board, defective user interface board, calibration drift in control electronics.

Safety: Unplug the unit before opening the cabinet.

Steps:

Verify actual humidity: Use a separate hygrometer to compare room humidity with the unit’s display.
Sensor cleaning: Clean the air filter and intake grille. Gently clean around the humidity sensor.
Power reset: Unplug for 5–10 minutes, then plug back in and reprogram the humidity setpoint.
Sensor replacement: If the displayed humidity is clearly wrong or does not change with room conditions, replace the humidity sensor.
Board issues: If the sensor is good but the compressor runs constantly regardless of the setpoint, the control board relay may be stuck, and the board should be replaced.

Medium 3/5

Humidity Sensor

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