Has anyone ever had to replace the vent controller, the unit mounted in the dash center section below the radio? Its the unit that is controlled by the center knob. Half of my vents dont want to work properly, if at all. Seems the only vent that wants to work is the one for the windshield. I already checked for kinked vacuum lines and checked the vacuum connector behind the glove box, and found nothing wrong. Im just going through everything methodically at this point. If anyone has any info on this problem, or has replaced this controller before and knows where to get it besides the dealer (last resort due to cost) please let me know. Thanks guys, and keep Jeepin' hard......