I am just looking for a fix. It's hot out there and after working all day in the sun I'd rather ride in a cool vehicle rather than messing with pressing buttons the entire ride home or waiting for the truck to get cool. When I start the AC, it goes to the window vents and not to the air vents. its cooling off the windows instead of me. When I press the vent it comes back down, I press the air button and it goes right back to the window vent. Where is the switch and how much does it cost to replace?