The electric fan stops spinning. Use a multimeter to measure the open circuit of the main coil. Open the rear cover, remove the four fixing bolts, and expose the wire package. You can see that there is a triode-shaped thermal fuse attached to the wire package. Its insurance temperature is 130C° and its withstand voltage is 250V. Under normal conditions, it is a conductor. Passed. Now use a multimeter to directly test both ends of the fuse. It is open circuit and the coil is good. If you don't have the goods on hand, you can remove the bad fuse and solder the two ends together and insulate it. It can still be used, but it cannot be used continuously all day long. It is best to take a break after two hours to avoid excessive internal temperature. Repair of shaking head failure: The power of the swing mechanism of the electric fan comes from the worm at the rear end of the motor shaft. After two-stage speed changes, it drives the four-link system to reciprocate. The failure of shaking the head can be divided into two situations: no shaking of the head and more than one shaking of the head.

1. The first reason for not shaking the head is that the shaking of the head is blocked, which is caused by the deformation and bending of the connecting rod. At this time, there will be some noise. The deformed connecting rod can be removed and can be eliminated after shaping. ;

The second is the transmission failure, which prevents the power from being transmitted and the capacitor drops, causing the problem. Solution: After the ceiling fan was installed, it was found that the speed was low and the rotation was weak. I initially thought that the speed regulator was inappropriate, but it was still the same after replacement. Try a 1uF capacitor and connect it to the original capacitor terminal. After the power is turned on, the fan starts spinning rapidly, indicating that the capacitor capacity is insufficient. Replace it with a capacitor of the same specification and the fault is eliminated.

Solution for bearing oil shortage: A floor fan, after one year of use, the fan does not rotate. It is difficult to turn the blade by hand. Remove the blades and apply engine oil on the shafts at both ends to turn them. After installing the blades, they spin for a while and then stop. The wire package is hot to the touch. Check that the capacitor and wire package inductance are normal, and it is suspected to be a mechanical failure. First remove the four-coin fixing screw and take out the rotor, then remove the ball bearings at both ends, wash them with kerosene, and soak them in No. 20 machine oil (or sewing machine oil) overnight. Install it in the original order the next day, paying attention to soaking the sticky gasket in engine oil again. After this repair, the electric fan started spinning again. In fact, the main reasons why the electric fan does not rotate are: winding open circuit, lack of oil holding the shaft, abnormal capacitance, etc. Based on the solutions introduced above, I believe you can easily repair your electric fan.