What are the reasons for abnormal noise when the Buick Excelle's air conditioning is turned on?

[MacCalvin]

There are many reasons that can cause abnormal noise from the compressor: for example, damage to the compressor's electromagnetic clutch, or severe internal wear of the compressor can both produce abnormal noise. Below are some related explanations: 1. Excessive clearance: There should be a certain gap between the compressor mounting surfaces. If the gap is too large, the impact will also increase. If the gap is too small, movement interference will occur between the electromagnetic clutch and the compressor mounting surface when the clutch is engaged, which is also a common cause of abnormal noise. 2. Common faults: As a high-speed rotating component, the air conditioning compressor has a relatively high probability of failure, with abnormal noise being a common fault.