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What Causes the Abnormal Noise When Starting the Cruze with Air Conditioning On?

1 Answers

BryceAnn

07/30/25 10:33am

Here are the specific reasons for the abnormal noise when starting the Cruze with air conditioning on: 1. Dirty or stuck throttle valve: When the air conditioning is turned on, the compressor also starts working, and since the compressor is driven by the engine, turning on the air conditioning increases the engine load. The engine needs to increase the throttle opening to allow more air intake. When the throttle valve has carbon buildup or is stuck, it can cause engine shaking and abnormal noise. 2. Abnormal noise from the air conditioning pump: There are two main reasons for abnormal noise from the air conditioning pump—the electromagnetic clutch and the bearings inside the air conditioning pump. Noise from the electromagnetic clutch is mainly due to wear, which increases the gap, while noise from the air conditioning pump bearings is primarily caused by insufficient lubrication. If not addressed promptly, it can lead to the burning out of the air conditioning pump, rendering it unable to perform cooling functions. 3. Improper tension of the compressor drive belt: If the drive belt is too loose, the electromagnetic clutch is prone to slipping; if the drive belt is too tight, the load on the electromagnetic clutch increases. Improper tension of the drive belt can cause abnormal noise in mild cases and damage the air conditioning compressor in severe cases.

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