'68 AC/Heat Air Door Out
 

My under dash air deflector door in the Heat/AC box apparently quit working on my '68. The A/C and fan are on, but nothing comes out the dash vents. Just had some motor work done and I wonder if something was knocked loose or not reconnected. What are the usual suspects to check? Thanks!

check to make sure your getting vacuum to the heater control unit on the dash.
They may have left off the vacuum line or connected it to a non vacuum port.

I still can't get the door to divert to the center vents. It goes to the floor and the defrost. Am I putting vacuum to the right hose? Does anyone have a good '68 A/C vacuum hose diagram? None of my books have one. Help, it's going to be 96 humid degrees here tomorrow!