What Causes Loud Noise in Small Car Air Conditioning?
3 Answers
The reasons for loud noise in small car air conditioning include: 1. Excessive refrigerant: The amount of refrigerant added exceeds the standard, increasing the compressor's load and causing higher operational stress. 2. Different types of refrigerant: If the refrigerant types are mismatched, it can lead to air conditioning cooling issues. Currently, the commonly used refrigerant is R134a. 3. Damaged compressor bearings: When the air conditioning is off, the noise from the bearings may not be noticeable. However, when the air conditioning is turned on, the magnetic head and bearings engage together to operate the compressor, which can amplify the noise under load.
Loud air conditioning noise could be due to compressor issues. It's like the heart of the car; over time, internal parts wear out or lack lubrication, causing a humming sound. The fan motor accumulates dust and debris, and when the blades can't rotate smoothly, the noise increases. Sometimes, the belt becomes loose or cracked, creating a squeaky sound during friction. I remember last time when I helped a friend inspect a car, we found several leaves stuck inside after opening the fan cover. After cleaning, the noise significantly reduced. Additionally, insufficient or leaking refrigerant forces the AC system to work excessively hard to compensate, resulting in unusually loud noises. It's recommended to visit a professional shop for a comprehensive diagnosis rather than attempting adjustments yourself, which might damage other components. Regular cleaning of the fan and replacing filters can prevent such issues.
I've been driving for several years and have encountered loud air conditioning noises several times, mostly due to dirty fans or aging compressors. When fan blades get clogged with dust, they make rattling noises when spinning; if the compressor is too old, damaged internal bearings can produce screeching sounds. Belt issues can also cause noise, such as cracking or loosening. During a long trip, I noticed the noise getting louder, and upon inspection, it turned out some refrigerant had leaked, making the system work harder and increasing the noise. It's best to use your ears to locate the source, try simple cleaning of the blades or replacing the filter, and if that doesn't work, seek professional help. Developing a habit of regular checks, especially before summer, can save a lot of trouble.
