The only thing I can think of that he is refering to is the blend air door. It is part of the HVAC system that determines if you get AC or Heat. I have to ask, before you start ripping into this, if the engine is hot, the heater is on, and the engine is running, do both heater core hoses get hot? Also, is the engine running at a normal operating temp?
Friday, December 17th, 2010 AT 4:37 PM