Elsewhere on this board are links to the service manuals for your year of KJ/KK. For my '04 it's on page 24-25 and gives a complete breakdown on how to remove & install that unit. The blend door on my year is located on top of the HVAC unit under the dash and the electrical connection to it is viewable once you remove the glovebox.
Ok. I'm digging through my copy for the 2006 MY (never could find a 2007, and that bothers me, as there's some important ignition/throttle differences)
You must be registered for see images attach
Trying to figure out what combination of doors would give me the symptoms I experienced: virtually NO air flow out of any of the vents, definitely no powered flow through the floor vents (but, at travel speeds I was DEFINITELY getting cold ambient air blowing on my feet; ask my frozen toes about that one!) Recirc door #4 seemed to work fine, and would change the sound of the blower motor working. I could barely feel any air moving out the defrost vent on top of the dash, but it was sort of there. I'm not 100%, but I don't think the temperature control was working either. I'm kind of wondering, the blend door #2 and the mode-air door #5, could they somehow have gotten themselves hung up against each other?
Then as i'm reading more, I find this:
You must be registered for see images attach
I'm reminded of, the day before the storm, I went in and did 2 things:
1) installed the GROM bluetooth module in the jeep. (required pulling the center stack apart a little)
2) fiddled with the plow controller cable (which routes through the knee bolster area, which I took down briefly)
I think I need to go take a look and see... did the plow controller wiring or the mic wire for the GROM, somehow get too close to the vacuum actuators, and hung them up?
I'll be back...