Humidifier shuts off even though the room humidity is below the setpoint.

Safety first: Unplug before moving or opening the unit.

• Relocate the unit: Move the humidifier to a more central, open location away from walls, windows, and heat sources.
• Increase setpoint: Temporarily raise the humidity setpoint by 5–10% and observe operation.
• Compare with external hygrometer: If the unit shuts off while the room is still dry, the sensor may be misreading.
• Clean sensor area: Gently clean the sensor grille to ensure accurate readings.

If the problem persists, the humidistat or control board may need replacement.