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
65,575

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

1 out of 1 people think this is helpful.
kbro
18,955

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
128,025

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 2,481 nationwide Grand Marquis listings starting at $500.
ZIP:

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 2,780
#2 kbro
kbro
Reputation 1,290
#3 Ratpuppy
Ratpuppy
Reputation 680
View All

Related Models For Sale

Used Ford Crown Victoria"
19 Great Deals out of 1,066 listings starting at $1,200
Used Lincoln Town Car"
44 Great Deals out of 2,213 listings starting at $1,495
Used Chevrolet Impala"
1,215 Great Deals out of 56,804 listings starting at $1,295
Used Ford F-150"
2,205 Great Deals out of 100,555 listings starting at $1,300
Used Dodge Charger"
485 Great Deals out of 25,029 listings starting at $3,000
Used Chevrolet Tahoe"
687 Great Deals out of 24,212 listings starting at $1,955
Used Ford Mustang"
646 Great Deals out of 34,182 listings starting at $995
Used Ford Taurus"
366 Great Deals out of 16,241 listings starting at $950
Used Cadillac DTS"
88 Great Deals out of 1,836 listings starting at $3,495
Used Toyota Avalon"
216 Great Deals out of 16,555 listings starting at $1,500
Used GMC Yukon"
236 Great Deals out of 8,199 listings starting at $2,495

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
43 listings starting at $11,977
2010 Mercury Grand Marquis For Sale
3 Great Deals out of 94 listings starting at $9,991
2009 Mercury Grand Marquis For Sale
10 Great Deals out of 174 listings starting at $6,999
2008 Mercury Grand Marquis For Sale
12 Great Deals out of 223 listings starting at $3,495
2007 Mercury Grand Marquis For Sale
10 Great Deals out of 165 listings starting at $3,990