I am working on daughters 1999 Expedition Eddie Bauer with climate control system and trying to determine what I should fix. When operating the Climate Control Head, everthing switched to appropriate areas i.e. defroster, floor, floor/panel, etc and max air.
Problem: Have very little heat coming from front or rear. It is slightly warmer than cold and the temp guage is reading normal.
I checked the heater hoses at the firewall and both were hot and blower worked normal. Based on a lot of suggestions, I have taken off the dash and inspected within. The blend door itself looks fine and so does the heater core. The blend door actuator is in the full closed position which it would be, I think, for maximum heat. The below link has a picture of the blend door position and other pictures of vacuum operated switches that I checked for function.
Please post in your browser if it does highlight and confirm the door position.
Since the problem is front and rear, I am beginning to think that I have wasted by time since the problem is front and rear and not just the front.
I have read where others have replaced their water pump and solved their problem.
To be honest, I am lost. If the problem is front and rear could both have failed at the same time? The air conditioning works fine front and rear.
It would also be helpful if someone can tell me how to check the blend door actuator with a external power source also since the dash and electrical system is disconnected.
Please advise if I should do something else before I put any money into replacing components that are probably good. I need to proceed quickly since she was using my 2004 expedition until Monday Night when she got hit by a drunk driver. It is possible now that my car is going to be totalled and she is without transportation and I am stuck with my Fusion.
I thought I covered all the bases before I started but now that I have torn it down, I am really second guessing myself and thinking that "The further I go, the behinder I get"