Q: Why did AC air start coming thru defrost vents instead of dashboard vents? on 2006 Ford Crown Victoria

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Every time it is in cooling mode this occurs. Cold air comes out of the defrost vent as well as the floor heat ducts.
(1) Answer
(2) Comments
Vacuum controlled mode selector! Possible control panel issue!! Easily tested with a Mityvac test kit. Not really a DIY project.... Don't know your skill level!
I was hoping that I found someone that had the same problem. Without tearing the dash apart I thought it might be a vacuum modulattor which directs the air flow from heater,- and defrost outlets. If someone else had the same problem perhaps they could pinpoint the issue thus avoiding removal of the dash panel which I am sure is a lot of work, from experience.
Takes about 5 minuets to remove the hvac control panel ...and I HAVE had this problem with them!!.... However you must test it to conform that is the problem!! See YouTube for a video on this... Without testing... ANY answer is no more than a best guess!!
Good luck with it!