What causes the squeaking noise when the air conditioning is turned on in the H6?
2 Answers
H6 air conditioning noise is generally caused by internal or external noise in the air conditioning system. Internal noise is usually due to air or moisture in the refrigerant, which creates noise during evaporation and expansion, making the user feel like the sound is coming from inside the dashboard. External noise is typically from the air conditioning compressor, and the sound can be felt near the compressor. Below are other possible causes of car air conditioning noise: 1. Impurities in the refrigerant: The noise is usually caused by air or moisture mixed into the refrigerant. 2. Damaged internal structure of the compressor: If the noise persists after refrigerant recharge and is located near the compressor, there is a high likelihood of internal mechanical damage to the compressor. If the noise recurs after some time and is located inside the dashboard, the efficiency of the dryer bottle may have decreased. The noise after the air conditioning starts is mainly the working noise of the compressor and is not considered a fault.
When I used to drive my H6, there was often a squeaking noise from the air conditioning after it was turned on, sounding like a bird chirping, which was really annoying. Later, I found out it was due to the aging and loosening of the AC belt. Once the belt wears out or slips, it produces this kind of noise due to friction. If the bearings inside the compressor are worn or lack lubrication, they can also make similar noises, especially when the car is driving at low speeds or when the AC is first turned on. I recommend first checking the tension of the belt to see if it needs adjustment or replacement. If the noise disappears when the AC is turned off, it’s likely a compressor issue, and you should get it repaired promptly. If the internal parts of the compressor age and aren’t addressed, they may burn out faster, leading to higher repair costs. Paying attention to these details while driving can help avoid being bothered by noise during long trips.
