1991 Olds 98 hvac programmer
 

hello all, I just had the AC changed over and a new compressor installed a few months back. Cold as ice. Now, the air is not cold. The mechanic tried a new control module, but that wasn't the problem. Another mechanic said that I need an HVAC Programmer. Nobody know what this is. Apparently it's an ecm of sorts that's behind the dash. Anybody know the proper name of this unit and/or where I can get one? thanks in advance,

bruce