What is the reason for the motor fan blades not rotating

The motor blades do not rotate due to insufficient lubrication, internal motor faults, circuit and power supply issues, blade jamming, and motor overheating.

The common reasons and solutions for motor fan blades not rotating are as follows:
1、 Insufficient lubrication of the motor
Reason: Long term lack of maintenance, insufficient oil in the bearings leading to increased friction and difficulty in driving the motor.
Solution: After disassembling the motor, drip lubricating oil into the bearings, clean and reassemble.
2、 Internal motor malfunction
Capacitor damage
Insufficient starting capacitor capacity can cause the motor to fail to start or the speed to decrease, and it needs to be detected and replaced.
Coil short circuit or burnout
Overheating of the motor or internal circuit faults may cause a short circuit, and the coil condition needs to be checked and damaged components replaced.
Wear or excessive clearance of the shaft sleeve
Wear of the shaft sleeve or excessive clearance between the shaft and the bearing can cause the motor to be unable to drive the fan blades, requiring replacement of the shaft sleeve or adjustment of the clearance.
3、 Circuit and power supply issues
Power failure: Check if the plug is loose and if the power cord is disconnected to ensure normal voltage.
Abnormal control circuit: If the thermal fuse trips or the timer malfunctions, the circuit connection needs to be checked.
4、 Other reasons
Blade jamming: Clean up accumulated dust or foreign objects to ensure flexible rotation of the blades.
Motor overheating: After prolonged use, it is necessary to shut down and cool down to avoid triggering the protective device due to overheating.
Suggested action: Prioritize checking the capacitor and lubrication condition. If the problem is complex, it is recommended to contact professional maintenance personnel.