Hi
I have a Mercury 2006 Grand Marquis and no matter what
the setting on the controls all the air comes out of the defrost
vents any advice on what i can do to fix this???

Thanks Rick

 

I also have an 06 GM and just went though this repair. The vacuum seals inside your AC control unit are leaking. It's a very common problem. You can purchased a rebuild unit for around $200 or do the repair yourself. I did it myself and it cost me about $8 and 2 hours of my time.

Here is a link to step-by-step seal replacement.

http://2008crownvicowner.blogspot.co...mperature.html

 

I also have an 06 GM and just went though this repair.