I posted in the Cooling Ac forum but didn't get any replies.

I found the problem with the switching from floor to defrost. One of the arms on a vacuum motor was becoming dislodged from the plastic arm it operates. I bent it up to engage and it's working fine now. However, I am still having problems with the heat not getting hot. The AC works fine. I am centered on the cables that operate the door. The box feels like it gets hot but when I operate the thermostat switch it is not a smooth operation. It sticks and kicks back a bit at the high end of the red. I believe the problem could be the cables. They look easy enough to replace with one exception. The heater box end connects with what I belive is a small 10m screw on top. Do I remove that for it to release the cables? Of course then there is the adjusting mess to get it to work properly.

Any ideas are appreciated.

 

you might try getting one of the cheap manuals from the auto parts stores. I don't konw if it would have that type of information but it might help. Otherwise, its going to be trial and error.