solstices

There's no air coming out of any of the vents.

I just scored a really clean 86 wagon. The only issue I have left has to deal with pertains to HVAC system/ Heater system. I cant get any air to come out of any of the vents. The blower fan is blowing strong, the vacumn line seems to be functioning and I can see the levers move when I switch from defrost to heat to bilev and to vent. The hot/cold slider seems jammed up, I disconnected the cable from the slider and the jam up seems to be down on the flapper valve side. The only other thing I can see that might be involved would be this big goldish pot with a nipple on it that is just above the gas pedal. Oh ya and the heater core seems to be getting hot. Im at a loss and looking for a little help