I have an issue with my AC. After evacuation, I put the switch on Max, fill it up, compressor begins cycling, air is blowing out of the top vents, but it's not cold. The fan also comes on. I've talked to many AC people and even a local GM mechanic and no one has any suggestions on what the heck is going on. Has anyone else here had similar problems? I think I just might replace everything except the compressor and see if that fixes it.