it may be that the use environment is too dirty, there is too much oil inside, or the contact point is in a humid environment for a long time, which may easily lead to oxidation and rust. Solution: Clean the socket, improve the environment and keep the contact point dry. The socket is often in the plugging and unplugging state, which is easy to cause the internal electrode to deform and collide with the adjacent electrode for short circuit tripping. Solution: Replace the socket with a new one, or disassemble the socket and adjust the electrode shape. The plug of the range hood is often plug and unplugged, which sometimes leads to the electrode plate loosening and virtual plugging, but it is easy to cause tripping when the flash is inserted. Check the plugs and sockets for incorrect connections in time to ensure that the connections are firm and conductive. Poor contact between plug and socket leads to local current overload trip. If the electrode plate of the plug is loose, replace it with a new plug head in time. If the socket gap is too large, it can be disassembled and adjusted to ensure that the electrode is fastened after the plug is inserted. The performance of air switch is poor. If the performance is not good, the air switch can be replaced in time. If the newly installed line is opened, it may be overloaded and tripped due to insufficient capacity. If the capacity is insufficient, the air switch can be replaced with a capacity that meets the use requirements and is within the line bearing range. The range hood itself has a short circuit or leakage fault. When the range hood itself fails, you can directly ask professional maintenance personnel to repair or replace it.