How to check if the cooling fan malfunctions?

With the rise of cooling fans, more and more people are using them. As we all know, the cooling system can be used in various occasions and equipment. The cooling system can be used in aircraft, cars, electric toothbrush and electronic masks. Of course, each device has a service life. When the cooling fan stops working, it will also directly affect the service life of the equipment, So how do we check the reasons and solutions for the malfunction of the cooling fan when it is stopped or in the cooling fan?
1. The cooling fan bearing is rusted and directly stuck; The cooling fan shaft rusts and the lubricating oil evaporates for a long time. Solution: Drop lubricating oil onto the shaft at the center of the shaft, and do not drip too much onto the shaft.
2. If the cooling fan is used for a long time and the chassis is not cleaned regularly, it will cause excessive compression of fan dust and cause the fan to rotate when it is not rotating; Use a cotton swab to clean the accumulated dust from the cooling fan.
The performance and quality of the cooling fan are unreliable. Choosing a three stream cooling fan brand can cause damage to the fan or prevent it from rotating.