Why does the cooling fan motor not rotate?

The reasons why the cooling fan motor 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 the rotation is stiff, there is basically no lubricant.

2. Wear caused by long-term use. If a fan is used for a long time, the motor will wear out, and the motor 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 in this case.

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.

5. Electrical failure problems, such as line damage, etc.

The repair method is as follows:

1. Many times the reason why the fan blades do not rotate is due to poor maintenance. If the fan blades rotate stiffly after turning off the power, you should drip some lubricating oil into the shaft so that it can be lubricated so that it will not affect the motor to drag the fan blades.

2. For the fan blades that do not rotate due to wear, the easiest way is to replace the parts, especially the bushing, which is easy to burn if worn.

3. If the capacitor capacity becomes smaller and the fan does not rotate, you can remove the capacitor and replace it with a new capacitor of the same model. It is recommended to choose a capacitor that is 20% larger than the original capacitor, which will have a better rotation effect.

4. If the axial clearance of the rotating shaft is too large, you can choose to adjust the gasket after disassembling the motor. However, remember that when installing the motor back, you must pay attention to the fact that the rotor must be concentric with the bearing. Slowly tighten the lubrication screw diagonally. Finally, tap the rotating shaft with a wooden handle to ensure that it is concentric.

5. If it is due to electrical failure, you can check the wiring lines. Sometimes the wires are damaged, etc., and you can repair the problem.