Devola humidifier displays H1 and stops producing mist.

Safety: Unplug the humidifier before refilling or cleaning.

H1 typically indicates that the water tank is empty or not correctly detected.

• Refill tank: Remove the tank, fill it with clean water up to the indicated level, and reinstall it securely.
• Check tank seating: Ensure the tank is properly aligned and fully seated so that the level sensor or float engages.
• Inspect float/sensor: On Devola humidifiers with a float, check that it moves freely and is not stuck with scale. Clean with a soft brush and white vinegar if necessary.
• Clean water inlet: Make sure the valve or opening at the bottom of the tank is not blocked by debris, preventing water from reaching the base.
• Sensor replacement: If H1 persists with a full, correctly seated tank, the water level sensor or reed switch in the base may be faulty and require replacement.