The causes and solutions of loud noise of automobile fans are 10:

1, deformation of exhaust fan blade in air conditioner; Solution: replace the exhaust fan;

2. The exhaust fan motor in the air conditioner is broken; Solution: replace the exhaust fan;

3. There is more dirt in the air conditioner; Solution: Clean the air conditioner.

4. The clutch bearing in the air conditioning pump is worn; Solution: Replace the air conditioning pump assembly.

5. The air conditioner filter has not been replaced for a long time; Solution: Replace the air conditioner filter.

6. The blower is loose due to vibration screw; Solution: Stop the machine immediately, restore the loose bolts, check whether the fan is damaged, and then start the machine after confirming that there is no problem. Check and maintain bolts at ordinary times.

7. The fan blade collides with other parts; Solution: You need to turn on the fan to remove dirt or foreign matter and repair damaged parts.

8, fan motor wear and damage; Solution: drive the vehicle to the repair department in time, replace the exhaust fan motor, or replace the exhaust fan with a new one.

9. Excessive bearing wear; Solution: observe the water tank and surrounding parts to see if the bearing is excessively worn;

10, the rotor rubs the stator; Solution: Check the transverse and longitudinal clearance of the motor rotor shaft. If there is no problem, remove the motor and fan and check whether the fan blades are deformed. If there is no problem, turn on the motor and check whether the rotor rubs the stator.