Hello all, I have a 2000 Ford Expedition RWD with the 5.4L in it. It has 232,000 miles on it and it runs just fine like day one. I have been having some weird AC issues these past few months but I haven't figured them out. Now that it is 110+ outside I am wishing I had the AC. The front blower motor does not work. I tested the voltage going to the blower motor and no matter how much I adjust the dial, it stays at 8.70V. I figured it was the resistor and blower motor. The thing that troubles me is the rear AC vents work just fine but they don't get cold at all and I can hear hissing in the AC lines while it is on. The hissing sound mainly comes from the back of the vehicle and I took a side panel off and I could hear the hissing in the lines. I would understand if the front doesn't work but wouldn't the rear still get cold and work? I am starting to think that the whole EATC system doesn't work and needs replaced. I am wondering where should I start looking? I did the self-diagnostic thing and nothing came up so that was of no help. Thank you so much!