I was using my defroster this morning in sub zero temps and I noticed that only one vent was blowing out real strong(inside driver vent) I then noticed that a bunch of air was coming out of the floor vents. Is this normal, or is there something I can do to stop the air coming out the floor in defrost? FTR every other setting works as its supposed to, only have issues with defrost.

 

It may be the doors are not fully closing. Or the vents shifted, over time it is possible. If you have done any work under the dash maybe it wasn't put back right.

 

well i did remove the blower motor, but im not sure if this was present before this or not. It almost seems like the door isnt fully closing.

 

mine does the same. however i kinda like it. keeps my feet warm. that was the one thing i didnt like about these trucks was that there wasnt a setting for the defrost and feet at the same time