If the pressure is too low, the low pressure switch will turn off the clutch (that is testable by pulling off the plug and running a jumper wire across it). You might have a burnt compressor, or it might just be low pressure. You can buy a cheap recharge kit at autozone and try and charge it before spending the big bucks on a compressor, or leak elsewhere (condensor etc). Lots of tire places will also do ac charging, they can tell you if it has enough R134A or not.
If you get it back to AF, Tanners Radiator & Auto Air Conditioning in AF is good (near PG border on state). I went to HS with him, he does good work. I've had him do both radiators and acs in various vehicles.