Fans are not blowing, I hear vacuum pump and I see the blend door move when I turn ac on/ off. Air came on randomly today when I was driving but now it’s not blowing.If you're fan runs, there should be flow ..... somewhere, if the fan has an available supply and outlet media (air) path. However, if you have no vacume the in dash blend door doesn't work. Usually defaults to the defrost position. Do you hear the vacume pump when you " wait to start " KO?