The kitchen wall switch is out of power the switch is new, it s not broken, is the air switch broke

First of all, you have to check whether there is a voltage output at the lower end of the empty switch, if there is an output and the switch to the kitchen is out of power (the switch controls the live wire), it means that there is a problem with your line - the middle is broken or the neutral line is controlled, your specific situation is not explained!

The fire line and the neutral line collided in the wall. It may be that when the original decoration was made, there were joints in the inner line of the wall. >>>More

Reset the protector button. Then just send the gate.

Check the connection of the ventilation fan, whether it is caused by the light flashing in the room caused by the intersection with the lighting line!

[Sockets and switches connected by yourself] are easy to do, you know the live wire, neutral wire, grounding wire, do you confirm that there is no wrong connection.