Strange noise when A/C is on in my '90 Accord

[SiggyBaby]

When I turn the A/C on in my '90 Accord 4-cylinder LX sedan, it makes a loud whining noise. When I turn it off, the noise goes away. The car drives just fine with the A/C on. I assume this is something with the A/C compressor. Anyone know exactly what it is and what is involved in fixing it? Thanks in advance!

[AccordCodger]

If it's the compressor (which it sounds like it might well be) then the only fix is a new compressor. Not cheap. Does the AC work? If it does, you might as well keep driving until it gives up altogether.

[SiggyBaby]

Yes, the A/C works just fine. I had to give it a charge several months ago because I was nearly out, but since then, it gets good and cold.

[mpumas]

The whining could be a loose belt or even an overcharged system putting an extra strain on the belt system.

[SiggyBaby]

Originally Posted by mpumas

The whining could be a loose belt or even an overcharged system putting an extra strain on the belt system.

On the compressor? I have taken the car to a local Honda/Acura repair shop that specializes in only these makes of cars and they are very good with their work. I'm guessing I should take it to them? I don't want to get charged an arm and a leg for this.

[jeffcoslacker]

Spray a little water or WD-40 on the A/C belt while it's running with the A/C on, and see if the noise changes or goes away. If it does, you just have a loose or glazed belt that's singing.

[SiggyBaby]

Thanks., I'll give that a try. To add, it doesn't do this all the time. Particularly when the car is sitting idle at a light with the A/C on full blast. Once I start to move, the noise gets a bit louder then goes away completely.