2008 Mustang GT, the air won't blow out of the vents in the dash when I have the switch set to that. It will work properly in the other positions. Max AC blows out of the vents, and the vent/floor works properly also. When I switch it to vent, it blows out of the defogger vent. It seemed to happen after I started using the defog more when the weather got cooler and more humid. Any ideas?

 

Did you gear clicking before or during this issue? If so it may be the vent door actuators.

http://www.allfordmustangs.com/forum...ore-start.html

 

@fixmejesus I think I do hear the vent doors clicking. When I go to defog and then to vent, it'll blow out of the vents for a few seconds and then go back to defog. Thanks for the link.