The reasons why the electric fan does not rotate are as follows:

1. Poor maintenance and long-term lack of lubricating oil. Make sure there is lubricating oil on the fan shaft, otherwise the motor with the blades on it will not be able to move it. If you are at home, you can choose to turn off the power and then turn the fan blades. If they rotate, it proves that they are not broken.

2. Wear and tear caused by long-term use. If a fan is used for a long time, the motor will wear out, and the motor's bushing will easily burn out after wear.

3. The fan does not rotate due to overheating. There is a motor in the fan device, and there is an overheating circuit breaker in the motor. If a short circuit occurs in the coil winding, the heat will increase in a short time, and the motor will stop spinning.

4. The starting capacitor capacity becomes smaller. When the fan is used for a long time, the capacitance capacity will decrease, causing the motor's starting torque to become smaller and unable to drive the load.