Humidifier (Haier room humidifier) displays H1 and stops adding moisture.

Safety first: Unplug the humidifier before removing the tank. Do not overfill the tank.

• Refill tank: Remove the water tank, fill it to the indicated level with clean water, and reinstall it securely.
• Check tank seating: Ensure the tank is properly aligned and fully seated on the base so that the valve opens and the level sensor engages.
• Inspect float: If your Haier humidifier uses a float, check that it moves freely and is not stuck by mineral deposits. Clean with white vinegar if needed.
• Clean level sensor: For electronic level sensors, wipe the sensor area gently with a soft cloth to remove scale.
• Replace sensor or float: If H1 persists with a full, correctly seated tank, the float or level sensor may be faulty and should be replaced.