Liber8tor, you are exactly right. If the blend door is bad and stuck in the heat mode it will pull air across the heater core instead of the evaporator, hence no cool air. Need to check it out. 2nd part of question, would it have a rough idle? Not necessarily, am let to believe from other posts, the actuator can be functional but the blend door is broken internally and not connected to it. Vacuum system could be good to go.
Last edited by Good old Bill; 06-01-2009 at 09:42 PM.