Air Conditioning question

[Ieatcamaros]

After reading your reply saying that the diverter was vacuum operated, I started checking things out. Yesterday I noticed this little thing on the firewall (in the pic) had a line going into the dash down where the evaporator core is. I had put a plug on it (where the vacuum line is now). I took the plug off and put a vacuum hose on it. I can now select where I want the air to blow. My hat's off to you Philosofer. There is no telling where that thing originally got it's vacuum source, but it now comes directly off the vacuum tree/manifold. I put a pic up so if anyone else has this problem they can see what has to have vacuum before the diverter door will change directions.