AC Box Rebuild-Missing Flapper Door

4spdragtop said

I believe Dana is correct. That "switch" i think goes closer to lower drivers side. I could be wrong tho. I belive it acts like a "thermostat"??
Not sure if you have installed the spring clips around the perimeter yet? Those things are DAMN TIGHT!!
Before we reinstalled ours i took some of the tension outta them. They will crack the 60 yr old casing very easily.

Click to expand...

Yes, the heater side of the unit is all together and ready to. No issues with that side.

You are correct, those clips were a little scary installing knowing that the box is old and brittle. What I did was use a pair of sheet metal vise grips to spread out the pressure and SLOWLY squeezed until the gap fully closed and new sealer put in the grooves had spread out. Then the clips when on pretty smoothly.