The air is only blowing out of the defrosters regardless if I have it set on floor, vent, max A/C or any of the rest of them...I am thinking it is that switch behind that ****...any ideas?

1995 150, supercab, 302 V8 4x4.

 

you probably have a vaccum leak either at the vaccum canister in the engine compartment or the supply line going to the heater control
there should be either a coffee can looking resivour? or a round sphere made of plastic check and see if either are broken or rusted out.. if ok follow the vacuum lines to and from the canisters .. good luck