Been having problems with my HVAC selector:

I can use the window vent, and the upper vent controls

BUT

Nothing comes from lower vents, or any mixture of lower vents with either upper or window ventilation.

Can Anyone help me out??

i posted a while back about this its sounds the same as what i had theres a cable behind the panel and its bent mostlikey got bent turning the knobs tofast so u can reach under the hvacs and feel it and as u trun the knob guide it in or tear ur dash apart and replace it . i just reach undr there and guide it in cause summer ac blowing out the top vents and winter out the lowerr dash vents so ur choice guide it or replace it. hope this helps.