One small issue, I have no idea where to start. The heat and A/C both work, but the floor, vent and defrost position do not change. I can hear the blower motor working, but just a little air coming out . . . everywhere. Any input would be welcome. As a note, I did replace my Vacuum Pump thinking that would correct the problem along with my brakes. The Brakes work as advertised now, the selector control, no change. Thank you for your assistance.