Humidifier displays F1 and stops producing mist

Safety: Turn off and unplug the humidifier before removing the water tank.

Steps:

• Remove the water tank, fill it to the recommended level, and reinstall it carefully so it sits flat and engages any actuating pins or valves.
• Inspect the float chamber or level sensor area in the base. Clean away mineral deposits or slime using a soft brush and white vinegar, then rinse and dry.
• For models with a magnetic float and reed switch, ensure the float moves freely and is not waterlogged. Replace the float if it no longer floats properly.
• If the unit still shows F1, access the base and locate the water level sensor assembly. Check wiring and connector to the control PCB.
• Test the reed switch or electrode sensor according to the service manual. Replace the level sensor assembly if it fails continuity or resistance tests.