Humidifier shuts off even though the tank is full and the room is dry.

Safety first: Unplug the humidifier.

• Reseat tank: Remove and reinstall the tank, ensuring it is correctly aligned.
• Clean float/sensor: Access the float or level sensor in the base and clean off mineral deposits with vinegar and water.
• Test switch: If equipped with a reed or micro‑switch, test for proper operation with a magnet or by actuating the lever. Replace if faulty.
• Use filtered water: To reduce future buildup, use distilled or filtered water where possible.