Humidifier displays 'Lo' and does not produce mist

Safety: Unplug the unit before removing the tank.

• Refill tank: Remove the water tank, fill with clean, preferably low-mineral water, and reinstall securely. Ensure the cap is tightened properly so the internal valve opens when seated.
• Check tank seating: Make sure the tank is fully down and aligned with the base. Many Stadler Form humidifiers use a mechanical pin or magnet to detect the tank.
• Inspect float: If your model has a visible float in the base, ensure it moves freely and is not stuck by scale. Clean with warm water and a soft brush.
• Sensor check: If 'Lo' remains with a full tank, the water level sensor or reed switch may be faulty and require replacement.