I just came into possession of a 1999 Buick Century Custom. The only issue I have come across in my time driving it the past two days or so is that the A/C randomly squeals. I cannot reproduce the sound it makes. Let me clear up the fact that it is not a noise under the hood or something with the belt/compressor. The noise is coming from inside the dash.

When this squealing occurs, the A/C cuts out completely. When I turn the switch off and then back on again, the A/C resumes and works just as well as before.

I have absolutely no clue what the issue could be and I really hope someone could provide some insight into this issue. This car is my new daily commuter and I HAVE to have air conditioning during this hot summer.

Thanks so much!

Check under the dash, you may have a actuator arm moving funny.

Not to sound dumb, but where can I find this actuator arm?

Thanks again.

Look in that area under the glove box. You can also turn on the AC and listen around and try to narrow down where it is.

Okay - I will give that a shot tomorrow.

If I were to try to capture a video of it, would that help?

Ya, it will help.

After looking around some more, I have seen a lot of people say that the blower is what makes the squealing noise. Are those easy to take apart and clean or would I need a new one? (assuming this is the issue)

Does this sound like a good suggestion to you guys?

That could be it. Guess I misunderstood your description.

From what I can see in the manual it says, remove the right side panel under the glove box. The blower motor is under the dash there. You unplug it, then remove the 3 bolts and it will come right out.

I've cleaned a few blowers that were making noise and they worked much better after a good cleaning. The fan part is likely very dirty. Clean the shaft by the motor and put a little 3in1 oil on the shaft.

Thanks for the tips on how to get it out of there and clean it up.

My next question is this - would this be the cause of a random squealing noise or would a dirty blower make a constant noise? Maybe something is caught in it? I have heard people say that dirt and pine straw and a bunch of other debri have gotten lodged in theirs before and it would cause a lot of noise.

autozone lists a cabin air filter for your car i dont know where it is. on my car it was under the plastic that covers the pass side windshield wiper. the newer cars have these to keep the trash out of the blower motor