Anyone have problems with their AC? Last week I noticed a slight, buzz, when I turn on the AC. When I turn on the fan, it doesn't make a noise, but when I click the AC button it does. It also doesn't seem to be cooling. Any idea what this might be, and I'm assuming this isn't covered under powertrain warranty. I've got almost 60K miles on it. So i'm out of the 30K warranty.

Thanks. - it's a 2000 btw.