HVAC door doesn't close all the way

[Nuje]

Had a clogged evaporator so while taking that apart, did the blend doors which had maybe half the foam gone already.
This one dropped out as I was prying the box apart. I put it back in and got the bottom in the slot, but it won't close all the way. It opens all way to the stop in the other direction, but the photo below is as far as it moves to fulling blocking off the front-facing opening.

What did I mess up?

 

[csstevej]

Are you moving the cable by hand or using the controls from the car?

 

[Nuje]

I was using the dials/controls on the HVAC panel.
Turns out that, while I *thought* I'd kept the cable in place, the cable housing (white, yellow, or green - this was the yellow one) that's clamped down by a spring clip, had slipped somewhat. Following these instructions (below), I nudged the yellow housing about 1cm further back, which enabled the cable travel to push the door all the way closed.

As for my other issue with not getting the whole HVAC box separated top from bottom: I thought I had all of the screws removed, but when I'd finished putting in the plugs and aluminum-taping over some other parts, through the air outlet ports, (not to mention fighting to get the evaporator back in) and I was vacuuming up all the nooks and crannies, something caught my eye in this cranny:

Behold, ye "missing" screw:

 

[csstevej]

While your there id change out the heater core now….