The furnace ducting from the unit to the bath could be crushed under the floor between the furnace and first outlet. If it's a problem, you could drop the underbelly a little and take a look. It's not too big of a problem to drop a few feet of it and then put it back.
Glad you found the problem with the A/C and even more glad that you came back and let us know what the problem and fix was. It helps us help more people when we know what problems others have encountered.
Salem 29RKSS Pushing a 2500 Mega-Cab CTD!
Gotta go campin!