Cause Micro Cooling Fan does not turn

"Micro Cooling Fan" is our usual livelihoods of the most common household appliances, use a motor-driven fan rotation, then let the air speed up the flow of household appliances, is generally used to allow air circulation may cool hot weather. The role is very big fan, even our livelihoods necessary. Electric persistent the problems will arise, of course, fans will be, then the fan did not turn what caused?
1. Use a long wear incurred. If a "Micro Cooling Fan" with a long time, the motor will losses will be very simple to burn the motor sleeve wear. Wear long axis and also make too much space between the axes, so that the blades do not turn.
2. overheated incurred "Micro Cooling Fan" does not turn. Fan of the device where there is a motor, the motor will have a thermal circuit breakers, if the local coil windings short-circuited, the heat will increase in a short time, in which case the motor would "strike" does not move up. In addition, the motor is too hot, it will be a corresponding deterioration of load ability, so lead to power becomes low, unable to move stocks blades rotate.