1. Is the amount of water stored in the water tank sufficient?
2. Is the water tank cover covered?
3. Whether the drain switch is reset.
4. Check if the dry ball over-temperature protection switch is set at the highest temperature (20 °C ~ 30 °C).
5. Confirm the humidifying water tray of the humidifier
6. Is the water level normal? After three to five minutes after the humidifier is supplied, check whether the water level of the water level control box is normal.
7. Check if the wet bulb over-temperature protection switch is set at 120 °C.
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