Have the same problem in the '82, haven't torn into it yet, will check this post for updates. I live in Hopewell, Va. Perhaps we can chat in person. PM
Heat is uncontrollable, is extremely hot, temp is almost unbearable coming out of the vents. Voltage going to the monovalve is 13v, but the ACC will not change the voltage. Pulled the ACC, rotated the wheel, and get 1.5k of resistance top to bottom in minimum, varying to 8k in maximum. Same measurements on pins 1 and 2 off of the board on the left, where it plugs into the harness. I can hear relays clicking when I go to min and max when it's energized. Blower fan works on high and low, auto doesn't seem to matter a whole lot.
Does it sound like I need a new ACC? I have one torn apart on the bench, and there are no burnt traces or anything.
TIA[/quote]

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83 SD

84 CD