2. The electric fan is overheated. Overheating of the motor will also lead to the deterioration of the load-carrying capacity of the motor and the decrease of the active power of the motor, which will lead to the inability to drive the load.
3. If the electric fan is used for a long time, the motor will wear out, and the shaft sleeve of the motor is easy to burn out after wear. Long-term use of the motor will also increase the internal resistance of the motor and decrease the load capacity, resulting in the inability to drive the blades to rotate.
4. The capacity of the starting capacitor becomes smaller. Those parameters are written on the nameplate. After a long time, the capacitance will decrease, resulting in a smaller starting torque of the motor, which can not drive the load. Remove this capacitor and replace it with a new one that is 20% larger than the original one.