My 97 Explorer blows cold air in MaxAC position and blazing hot air in all other positions. Temp control switch has no effect. I have read recent posts about the blend door. I looked behind the glove box and saw a black plastic box which fills all the space. It has a white plastic gadget on top, but I can't really see what it is. There is no obvious way to open or remove anything. There is a pneumatically operated damper beside the box which opens when the control is turned to MaxAC or off. With a hand on top of the white thing, I can feel something happen when the control is moved. The proximity to the airbag also makes me reluctant to poke around very much! Help please!
I went out to check the damper and the darn thing blew cold air in the AC position, at least for a while!