The reason why the indicator light of ultrasonic atomizer flashes is that the water level is not high enough and the water level does not exceed the water level sensing switch. Or the heat shrinkable tube on the surface of the water level sensing switch is broken or damaged. Or the atomization sensor board is damaged. It can be solved by adding water to the container to make the liquid level reach the optimal atomization range. Cut off the power supply and check whether the water level sensing switch and atomization sensor are broken or damaged. When the heat shrinkable tube on the surface of the water level sensor switch is broken or damaged, the broken or damaged part can be stuck with waterproof glue after the sensor switch is dried. Note that the adhesive layer should not be too thick, and the thickness should be less than 0.6 mm If it is a problem with the energy regeneration sheet, replace the atomizer energy regeneration sheet.