1999 Mercury Marquis V8 Two Wheel Drive Automatic 135000 miles
Just recently all I would get out of the defrost and floor vents is cold air. The blower motor speed works fine, So I found the vacume lines under the dash(behind the cup holder) and disconnected the yellow line to the diafram and bingo now I have heat. The problem is that I can't controll defrost or floor selection or hot and cold settings. When I run the EATC test it don't show any codes. What do I check next? Or what need to be replaced? Thanks.
Sunday, October 4th, 2009 AT 7:21 AM