Humidifier switches off shortly after turning on; the indicator shows the tank is empty.

Safety: Unplug before inspection.

Steps:

• Check tank seating: Ensure the tank is correctly positioned so the valve opens and water flows into the base.
• Clean float and sensor: In the base, locate the float or electronic water level sensor. Clean off any scale or slime with mild detergent or vinegar.
• Test float movement: Make sure the float moves freely up and down. If waterlogged or damaged, replace the float / water level sensor assembly.
• Sensor replacement: If the sensor still reports empty with water present, replace the sensor or the humidifier main PCB depending on the design.