No matter what you set the air vent control to the air flow never changes. I have been told it may be an actuator. Where is it located and approximately how much would it take to get it fixed?

It never changes from def/floor. Nothing comes out of forward facing, forward facing/floor, etc.

you more than likely have a vacuum leak either under the hood near the firewall,passenger side,or under the dash at the controls.check under the hood first.start the engine,put on heat/face vents,listen for hissing sounds/vacuum leak,see what happens.when there is a vacuum leak,the blower defaults to the defrost mode,and sometimes defrost/floor mode.easy fix,and vacuum hose is cheap!!