A couple factory AC questions.

[rmneder]

I'm getting my factory AC back together. I don't have the compressor installed yet but I've got the interior part all together. I've been messing with the controls and when I set the lever to inside air the passenger side kick panel vent opens. I've never had working air conditioning in this truck so I don't know for sure, but shouldn't the vent open when the controls are set to outside air? Also when not in use and the fan off, what is the off position for the three levers. Does it matter what position they're in? Thanks.

[71CHEVYSHORTBED402]

Here's some notes from my tear-down you might find helpful. They have to be edited when I assemble it, but it's a start:

Top lever on the control unit (INSIDE/OUTSIDE - AIR/DEFROSTER selector):
• The cable connects from the top lever to the Air/Defroster Selector Duct. The top lever also operates the air door (RH kick panel & cowl) actuators.

• When the unit is set to INSIDE the heater water control valve closes water flow to the heater core, and the air doors close.

Irregularity: This was the only cable on the unit with a push-on retainer nut.

Middle lever on the control unit (A/C & HEATER): The cable connects from the middle lever to the Duct Air Selector. It diverts the airflow for the floor duct and A/C vents. The A/C compressor switch is triggered when set to A/C.

Bottom lever on the control unit (COLD / HOT): The cable connects from the bottom lever, routes through the firewall, and connects to the rod for the A/C Heater door on the evaporator box. The hole in the firewall is outside of the well, near the top RH corner of the well. This door directs airflow through the heater core, evaporator core or both.

[sick472]

The passenger side kick vent should close and the one in the cowl area should open for "outside air". For inside air...it's the opposite. When the cowl vent closes and the kick vent opens...the fan will pull air from inside the cab and recondition it. The opposite would pull air from only the outside.