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Reasons for Loud Engine Noise When Using Air Conditioning in Summer

1 Answers

LaArcher

07/30/25 8:52am

The following are detailed explanations for the reasons behind loud engine noise when using air conditioning in summer: 1. Dirty or stuck throttle valve: When the air conditioning is turned on, the compressor may also start working. Since the compressor is driven by the engine, activating the air conditioning increases the engine's load, which means the engine needs to increase the throttle valve opening to allow more air intake. When the throttle valve has carbon deposits or is stuck, it can cause engine vibration and produce abnormal noises. This becomes more noticeable after the air conditioning is turned on. 2. Abnormal noise from the air conditioning pump: There are generally 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 caused by wear and tear, leading to increased gaps, while noise from the air conditioning pump bearings is primarily due to a lack of lubrication. If these issues are not addressed promptly, they 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 will increase. When the drive belt tension is incorrect, it can cause abnormal noises in mild cases and damage the air conditioning compressor in severe cases.

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