On this car I have dial for fan speed, dial for temp/cold/hot and then dial for vent location such as dash defrost feet
I do not have ATC on this vehicle.
The mechanics told me all doors/actuators are operating as they are suppose to.
However, I will say that yes even when the defroster is used air is still restricted when on hot versus cold it works fine
I also thought maybe cabin air filter however when on cold does the air still pass through filter? or is it just on the hot when it passes through?
I have not checked the cabin filter or the cowl up under hood yet that will be next
Thanks for the help it has been driving me crazy and even more so when the shop could not figure it out.