What happens when the hair dryer suddenly stops?

The hair dryer at home has been used for a long time and is prone to malfunction. What is the cause of the hair dryer suddenly not moving?
Several reasons for hair dryer failure are as follows:
1. Maybe the solder joint inside came off. First check and see, if it is because the solder joint is off, it is not electrified, if you have strong hands-on ability, you can take it apart and connect it, and it is not possible to take it to a professional maintenance shop for maintenance.
2, the temperature is too high, the control device automatically cut off the power supply. Such as the temperature down can be used, hair dryer failure can be in accordance with the detection trilogy to see what is the reason, confirm the power connection; Make sure the switch is on and smell for coke.
3, the line problem. Maybe it's the rectifier circuit. Because this part of the circuit is working at high temperatures, it is easy to break.