What happens when the water fountain is plugged in?
Leakage of electricity, to see whether it has been wet water, or else the heater is broken, the heater line off, try,
Try again without jumping. The fault can be determined that the heater is out of order and needs to be replaced. If you jump, only the indicator lights are short circuited. Is there a cooling function? I didn't see it in the picture
Short circuit or to the ground, as the 1 floor said, put the second diagram on the right side of the red point of the cable pulled out (the lower part of the heater, it is connected to the heater)
