Checked fuses and did the contact cleaner thing.
I may spin em again to be sure but I think the fan is working
and the ccu detects the temp commands. I turn on the ac max and the
ac pump comes on. Select full hot and, lo and behold.... HEAT! but only
on defrost and outer vents. I can select anything and stays put on defrost.
I did have it working at one point but only briefly. The vacuum signal is
good at the first tee about 25lb hg.
I guess my question is where is the next place I should look? What should I dissasemble under the dash to find the other side of that pesky green/yellow line?
As far as the model it is a 81 300D automatic non turbo California model.

George

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Brownie' 81 300D Auto
Engin'r.....