Why is the BMW 525 air conditioning noise loud?
2 Answers
BMW 525 air conditioning noise may be caused by a dirty filter, which increases the fan's power and leads to noise. Reason one: One is the metal friction sound emitted when the compressor electromagnetic clutch engages, and the other is the squeaking sound caused by excessive force on the air conditioning belt. Both of these situations occur when the air conditioning is turned on and the accelerator is pressed. Reason two: The squeaking sound caused by excessive force on the air conditioning belt. Both of these situations occur when the air conditioning is turned on and the accelerator is pressed. Reason three: The metal friction sound emitted when the compressor electromagnetic clutch engages. The fault is usually due to a lack of lubricating refrigerant oil inside the compressor. When there is a lack of refrigerant oil, the internal piston of the compressor does not receive sufficient lubrication, resulting in metal friction sounds under the high pressure of the refrigerant.
I found that the loud noise from the BMW 525's air conditioning is often caused by wear and tear on the fan motor or compressor issues. As a car ages, these critical components are prone to aging, leading to abnormal noises. Blocked ducts or poor airflow are also common causes, such as when the cabin air filter accumulates dust and leaves, obstructing airflow and forcing the fan to work harder, resulting in a whooshing sound. If the compressor is noisy and accompanied by reduced cooling performance, it may be due to refrigerant leakage or insufficient levels. In such cases, I recommend first removing the filter for cleaning or replacement to see if the noise improves. If the issue persists, it's best to visit a repair shop for a comprehensive inspection, including checking the compressor's condition and belt tension. Regular maintenance of the air conditioning system, such as annual checks of refrigerant levels and pipe seals, can effectively reduce such faults.
