Dude! If you don't know a whole lot about AC systems, at least go pay $99 to get a good diagnosis THEN replace whatever parts yourself. IF your system WASN'T low, and you "charged it up", then sure as hell your compressor is now toast. I've been dickering with my system on and off for a year now, and "charging up my system" was an expensive lesson in what a cheap dumb-ass can lead to. So now I've put about $1200 into my car's A/C and know a whole lot more (I can swap out every freaking bolt and part myself in 1 day NOW), but I sure as heck wish I had not been cheap to learn lesson #1.