Hello, and good day to all. I have just spent 3.5 hours searching the history of acc problems and now feel I can ask a few questions, with a reasonable understanding of what the system is supposed to do. The ac worked great all summer, thax Larry Bible, as fall is soon going to be on us, I decided to check my heating system. I found defrost works great,inside heat dos not, when I switch buttons to cab heat, all I get is cold air from center vents. I checked aux water pump, nothing. The hose from the main water pump has little or no pressure, is really not even warm. My question is, is the aux pump a good place to start, as fuse is good. Does the pump being bad mean the conrtol unit is cooked? I can get no air out of the floor vents,yet the rear vent works, just cold air. As I switch from defrost to cab heat the defrost gets cold also. Any and all suggestions will be greatfully recived thanks steve