I'd start with checking the system pressure. There's a pressure switch in there that if it doesn't register enough pressure the clutch won't engage. I've had that happen on a few cars that I've bought.
A previous owner may have removed the belt and tensioner instead of having to deal with the R134 refrigerant update, sometimes that can get spendy
Last edited by Defiant; 06-14-2009 at 02:51 AM.