My A/C does not blow out of the main vents. No matter what position the switch is in(Max, Normal, Vent,etc..), air blows from the dash(up by the windshield) and by my feet. What could be causing the problem? The switch itself? Something under the dash? The a/c still blows cold but won't come out of the main vents no matter what i do. It's starting to get hot here in South Florida so I would like to get this fixed. Thanks.