Well, I decided to use the AC on my 2003 Focus ZX-5 (2.0 and auto) and I'm hearing this weird sort of rattling noise. The ac works fine and all, but I'm perplexed at the odd noise it's making. I don't use the AC often since I drive with the windows down most of the time. Does my lack of using the ac have anything to do with it? If there's a problem, it's under warranty, but I'd just like to see if I could figure it out. Thanks.
Mojo