Fan failure cause

1, poor maintenance, long-term lack of lubricants. bath ventilator fans shaft part is to ensure that there is lubricating oil, or the fan in the above motive can not drag. If you are at home, you can choose to turn off the power, and then toggle the fan, if the rotation is stiff, basically there is no oil.
2, with a long time caused by wear and tear. If a fan with a long time, the motor will be lost, the motor sleeve will be easy to burn after wear and tear.
3, overheating caused by the bathroom window fan does not turn. In the fan device is a motor, the motor will have a thermal circuit breaker, if the coil winding place short circuit, will let the heat increase within a short time, so the case the motor will "strike" fixed.
4, start the capacitor capacity becomes smaller. When the electric room fans with a long time, the capacitance will be reduced, resulting in the motor starting torque becomes smaller, can not drive the load.
5, electrical failure problems, such as line damage.