The display shows unrealistic humidity readings (e.g., always 20% or always 90%).

Safety: Unplug before accessing the sensor.

Steps:

• 1. Compare with external meter: Use a separate hygrometer to verify actual room humidity.
• 2. Inspect sensor: Locate the humidity sensor module behind the intake grille. Check for moisture or corrosion.
• 3. Dry and clean: Allow the sensor to dry if wet. Gently blow off dust.
• 4. Replace sensor: If readings remain unrealistic, replace the sensor module.
• 5. If problem persists: The main control board’s ADC circuit may be defective and require board replacement.