ac heater blower problem

there may be a vacuum leak under the hood that does not allow changing of the doors inside the dash. have it checked at a shop to verify. Roy

You may have an air directional flow issue. This could be caused by the cables that are connect to the control levers in the dash, and connect to the levers that control the various flaps in the air duct system. These cables my be either unclipped from their respective supports or unhooked altogether (come unhooked) due to the angle they connect at. (hope you know what I mean). Check that out first. If you look up under the dashboard on the passenger side, you should see at least part of these connections.