Humidity reading on display is clearly inaccurate compared to a separate hygrometer.

Safety: Unplug the unit before accessing the sensor.

Steps:

• Compare readings: Place an accurate hygrometer near the unit's air intake and compare readings over time.
• Clean sensor: Access the humidity sensor near the intake grille and gently clean with dry air or a soft brush.
• Relocate sensor (technician): Ensure the sensor is positioned in the main airflow, not behind insulation or panels.
• Replace sensor: If readings remain far off, replace the humidity sensor assembly. If still inaccurate, the main control PCB may have calibration issues and require replacement.