Electric fan common shaking head failure:
One, shaking the head of the obstruction caused by not shaking the head, is due to the deformation of the connecting rod bending caused by this time there will be a cackling sound, can be deformed connecting rod removed, plastic can be ruled out. If the transmission failure so that the power can not be transmitted, you can check the tooth rod swing head disk gear box clutch, etc., where found to have shed a foreign body jammed, as well as due to severe wear and tear can not be engaged and other phenomena, should be excluded or replacement of the loss of parts
Two, most electric fans use oil bearings, the bearings are usually powder metallurgy products, tightly wrapped in the bearing internal oil holes, when the electric fan work motor temperature rises, the friction between the rotor shaft and the bearing. When the motor temperature rises when the fan is working, the friction between the rotating shaft and the bearing generates heat, which will make the lubricating oil gradually consume, and the fan motor will not be able to maintain normal operation, and there will be a reduction in speed or even the phenomenon of not rotating, which will burn the motor.
Three, the fan gearbox, the use of lubricants generally 3 to 4 years to replace a replacement, replace the back of the shell, remove the balance key and then remove the gear box cover, with a small bamboo slice of light tools to gently scrape off the old inside the grease, and then clean gasoline to wash, and then add the appropriate amount of new grease.
The answer applies to most brands of electric fan models such as Gree, Midea and Haier.