Why does the Audi make a boiling water sound when the air conditioning is turned on?

1 Answers
StAugust
07/30/25 9:04am
Audi makes a boiling water sound when the air conditioning is turned on mainly due to the following two reasons: Refrigerant contains impurities: The abnormal noise is generally caused by air and moisture mixed in the refrigerant. Internal structure damage of the compressor: If the situation persists after refilling the refrigerant and the abnormal noise is near the compressor, there is a high probability of internal mechanical structure damage in the compressor. If the abnormal noise recurs after a period of time and is located inside the dashboard, the efficiency of the dryer bottle is likely reduced. The noise after the air conditioning is turned on is mainly the working noise of the compressor and does not constitute a fault.
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