What Causes Loud Noise from Car Compressor?
2 Answers
The reasons for loud noise from car air conditioning compressor are as follows: 1. Air conditioning: Poor heat dissipation in the air conditioning system causes excessive load on the compressor. In this case, it is recommended to clean the dirt on the surface of the radiator and condenser. 2. Blockage: There is a blockage in the air conditioning system. Focus on checking the air conditioning expansion valve. If the expansion valve is blocked, it needs to be replaced. 3. Intrinsic issue: The problem lies with the air conditioning compressor itself. Excessive noise caused by worn pump head bearings requires replacement of a new air conditioning compressor. The car air conditioning compressor is the heart of the car air conditioning refrigeration system, responsible for compressing and delivering refrigerant vapor. Compressors are divided into two types: fixed displacement and variable displacement.
Excessive compressor noise has several common causes. If the internal bearings of the compressor are worn or damaged, they will produce sharp metal friction sounds during operation, especially noticeable at high speeds. Loose mounting points are also common - if bolts aren't tightened properly, the entire unit vibrates excessively, creating a roaring noise. Refrigerant imbalance is another factor, where unstable pressure causes the compressor to operate erratically, increasing noise. Issues with the belt system, such as improper tension or aging wear, can also amplify sounds. When I encounter this problem during repairs, I first use a stethoscope to identify the source location, then promptly replace bearings or resecure components. Don't delay, as prolonged noise may cause damage to other components and affect AC efficiency. Regular lubrication maintenance can prevent such issues and keep the system running smoothly.
