1. Turn off the engine and allow the vehicle to cool down.
2. Open the hood and locate the blower motor, which is usually located on the passenger side of the engine compartment near the firewall.
3. Disconnect the electrical connector from the blower motor.
4. Remove the mounting screws that hold the blower motor in place.
5. Take out the blower motor from the vehicle carefully.
6. Inspect the blower motor for any visible signs of damage, such as cracks or broken blades.
7. Shake the blower motor to check for any loose parts or debris inside.
8. If you find any damage or loose parts, replace the blower motor with a new one.
9. Reinstall the blower motor in the reverse order of removal.
10. Connect the electrical connector to the blower motor.
11. Start the engine and turn on the fan to test the blower motor.
12. If the noise is gone, the blower motor was the source of the problem.
If you are still experiencing noise after replacing the blower motor, there may be another issue with the vehicle's heating and cooling system, such as a problem with the fan switch or the air conditioning compressor. In this case, it is best to have the vehicle inspected by a qualified mechanic to diagnose and repair the problem.
