Hello I have a 2000 GC Laredo with Manual Temperature Control, when the a/c is on cold air blows out of the driver and center vents (but not real strong), but warm air comes out of the 2 passenger vents. Vacuum appears to be working and I can hear the ductwork open and close when the modes are changed. Is there a malfunctioning duct or recirc door that is a possible cause and if so is it accesable to check? Is this similar to the dreaded AZC blend door nightmare? Any advice appreciated, thanks.