So its a 2005 f350 6.0 sportsmoble and I am having an issue with the AC. the AC seems to be working it blows from the top vent by the windshield, and the small vents just above the main vents by the drivers side and passengers side vents but does not blow out the center vents or the passengers side or drivers side main vents any ideas? (and keep in mind I have had rats under the hood before so what did they chew through)