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Why Is the Air Conditioning Noise Loud in a New Car?

1 Answers

VonRhett

07/29/25 5:09pm

Reasons for loud noise after turning on the air conditioning include dirty or stuck throttle valves and abnormal noise from the air conditioning pump. Here are the specific reasons: Dirty or Stuck Throttle Valve: After the air conditioning is activated, the compressor also starts working. The compressor is driven by the engine, so turning on the air conditioning increases the engine load. This means 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 vibration and abnormal noise. This becomes more noticeable after the air conditioning is turned on. 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 caused by wear and tear, leading to increased gaps. Noise from the air conditioning pump bearings is primarily due to insufficient lubrication. If these issues are not addressed promptly, they can cause the air conditioning pump to burn out, rendering the cooling system inoperable.

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