hot air is blowing thru vents when air is on cool on 2007 Mercury Grand Marquis

what is wrong

by in Leesburg, GA on April 03, 2013
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
ANSWER by , April 03, 2013
blend door issue or haeter box which is a common issue with fords