when i got the car, the a/c wasn't working--turns out all it needed was a new pressure switch. i replaced it about a month ago and it started working fine, even did a coolant recharge. a/c stopped working a couple days ago, though--all it does is blow hot air. question is how do i jump the pressure switch to test it and see if it's gone bad? there arn't any leaks--checked the hoses w/ the guage the coolant recharge kit comes with. i'm hoping it's just the switch, but why would it go bad so soon? any suggestions welcome, thanks guys.