When placed on max (the re-circulation) I get air from all of the vents but when placed to bi-level I get cold (or hot) air but only on the floor and windshield vents. According to the chart on the '85 FSM page 15-82 I should be getting air from all of the vents.

I am at a loss as to what could cause this. The only thing I could imagine is that I somehow reconnected the cable on the blower motor wrong so that it is reversing how it opens or closes the flap on the blower motor when I switch between the two. Looking at how it functions though I'm not sure how that could be the case.

 

Get someone to play with the lever as you watch under the dash and look for a bind. Something is broken.

 

https://i.imgur.com/S3cjvaO.jpg Here is a picture of my AC controls.

When set to REC - A/C MAX adjusting the cool/hot slider adjusts as expected when the AC button is depressed. I get air from every duct including the face and knee level ones.

On VENT as expected I get air from outside.

When set to BI-LEVEL nothing changes.

When set to HEAT I get hot air from the floor and top dash vents.

I'm wonder if perhaps "BI-LEVEL" is not a mode to select but rather a redundant description of the lower slider control. Given that REC - AC/MAX recycles air and uses the AC/heater when the lower slider is moved I have to wonder if I am just being an idiot here. Any input?

When set to defrost air is blown out of the top (and I think side) vents).