AC only through defrost vents

[BanOne]

Had a battery problem(loose positive terminal) this week on my wife's 2002 Yukon XL and she let a couple tennis friends "help" her, I think when they jumped it and put a charger on it some thing got fried because the ac only blows through the defrost vents and the gas gauge was pointing straight down. So is replacing the ac control head unit in the dash the solution? I messed with the temp actuator door already and that is working so it is either the head unit or the mode actuator door that got fried. Does anyone know where the mode actuator door is? There is a harness just to the right of the temp actuator door just in front of the blower that looks like it could be it but i am not sure.

Thanks in advance

Doug

 

[BanOne]

Can anyone give me some insight to this I was hoping to order parts today, car just doe not cool well coming out of the defrost vents, and in Florida can't have the kids running around in a hot car.

Thanks
Doug

 

[BanOne]

Well I found the mode door and the gears were not meshing so i had to push the door back into a position that the gears meshed together and now it cycles from one end of its travel to the other like it can't find its calibration point. Any one have any ideas about how to recalibrate. I tried to do it the same as the mixer door but no luck. Thinking I need to replace the control unit

Thanks
Doug