(1) Check whether the power cord is disconnected internally and whether the solder joints in the handle are out of welding. Repair method: repair or replace the power cord; Remove the handle and re-weld the solder joint.

⑵ Check the selector switch for serious oxidation, poor contact or damage. Maintenance method: polish and wipe or replace the new switch.

2. Common reasons why the hair dryer suddenly doesn't respond:

(1) The internal solder joint may fall off. Check it first. If the power supply cannot be supplied because the solder joint falls off, those with strong hands-on ability can disassemble the connection by themselves. If it still doesn't work, send it to a professional repair shop for repair.

⑵ If the temperature is too high, the control device will automatically cut off the power supply. It can be used when the temperature drops. If there is something wrong with the hair dryer, you can see what the reason is and confirm that the power supply is connected; Make sure that the switch is turned to the on position, and you can smell whether there is burning.

(3) wiring problems. There may be something wrong with the rectifier circuit inside. Because this part of the circuit is easy to open when working at high temperature.