Audi 80 w/ Hot!! Air coming from Side Vents w/ A/C on

[80q]

Help....

I can deal with A/C that doesn't work properly, but not with heated air when it's 90+ degrees out.

Car is a 1989 80Q with manual A/C.

A/C works fine through the center vent, but after time I have hot air coming in from the side vents.

The temperature regulator knob seems to work fine, but is as if is not closing fully.

I have removed the glovebox and lover shelf, but there is not a whole lot to look at.

Any help would be appreciated.

TIA

Jeff