AC is stuck on defrost and floor which is default. What needs to be done to get the air blowing thru vents?

George Shapleton
0

Asked by George Apr 12, 2013 at 03:48 PM about the 2009 Mercury Grand Marquis

Question type: Maintenance & Repair

3 Answers

tenspeed
59,345

I found a similar problem in our database. It seems like the Ford products have a module that can fail. GM products use vacuum tube which fail. You can't win sometimes. http://www.cargurus.com/Cars/Discussion-d362_ds499104

kbro
17,515

It most likely has a vacuum leak. Only a few times have i seen the control head go bad. you need to take the control head out and see if you have vacuum to it. and if not track down the broken hose

1 out of 1 people think this is helpful.
You think this is helpful.
Tom Demyan
109,605

The guys are right, a vacuum hose has popped off or cracked.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Grand Marquis
Looking for a Used Grand Marquis in your area?
CarGurus has 2,663 nationwide Grand Marquis listings starting at $1,800.
ZIP:

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 2,380
#2 kbro
kbro
Reputation 1,180
#3 Ratpuppy
Ratpuppy
Reputation 560
View All

Related Models For Sale

Used Toyota Avalon"
210 Great Deals out of 14,932 listings starting at $1,250
Used Lincoln Town Car"
76 Great Deals out of 2,343 listings starting at $1,399
Used Buick Lucerne"
155 Great Deals out of 3,046 listings starting at $2,990

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
24 listings starting at $11,708
2010 Mercury Grand Marquis For Sale
5 Great Deals out of 96 listings starting at $10,888
2009 Mercury Grand Marquis For Sale
15 Great Deals out of 154 listings starting at $7,800
2008 Mercury Grand Marquis For Sale
14 Great Deals out of 201 listings starting at $4,464
2007 Mercury Grand Marquis For Sale
12 Great Deals out of 183 listings starting at $3,495