What is the reason for the squeaking noise when the Buick GL8 air conditioner is turned on?
2 Answers
Abnormal noises in car air conditioners are generally caused by internal or external issues within the air conditioning system. Internal noises are usually due to air or moisture in the refrigerant, which produces noise during evaporation and expansion, making the user perceive the sound as coming from inside the dashboard. External noises are typically from the air conditioning compressor, where the sound can be felt near the compressor. Below are other possible causes of abnormal noises in car air conditioners: Impurities in the refrigerant: Noises are generally caused by air and moisture mixed into the refrigerant. Damage to the compressor's internal structure: If the issue persists after refrigerant replacement and the noise is located near the compressor, there is a high probability of internal mechanical damage to the compressor. If the noise recurs after some time and is located inside the dashboard, the efficiency of the dryer bottle is likely reduced. The noise after the air conditioner starts is mainly the working noise of the compressor and is not considered a fault.
My Buick GL8 has been squealing when the AC is on for quite a while. After several attempts to fix it, I suspect it's most likely due to a loose or worn-out AC belt. The belt connects the compressor in the engine bay, and over time, it can slip and produce that sharp squealing noise. I remember the last time I replaced the belt was two years ago—when it wears out, the increased friction causes the noise. I recommend checking the belt tension; if it's loose, head to a repair shop to adjust or replace it ASAP. Additionally, if leaves or dust get stuck in the blower fan, it might also cause squeaking. Don’t underestimate this noise—it could indicate compressor bearing wear, and a breakdown in scorching weather would be a nightmare. Wiping the air intake during car washes and regular maintenance checks can save you a lot of trouble.
