My AC will only blow out of the defroster vents. It doesn't matter what you turn the nob too I don;t really car about it not changing but I want it to blow out the AC vents can anyone help identify which vacuum lines to change or point me to a thread that can thanks George

You most likely have a problem with you vaccum source. When there is no vacuum to the blend air doors defrost is the default position. Check the hose coming off the intake manifold and there should be a ball located inside the ront of the left fender under the head light area. that is a resivour for vacuum.