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
51,675

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
15,995

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
89,955

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 3,381 nationwide Grand Marquis listings starting at $1,850.
ZIP:

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 1,800
#2 kbro
kbro
Reputation 1,040
#3 Tom Demyan
Tom Demyan
Reputation 440
View All

Related Models For Sale

Used Ford Crown Victoria"
33 Great Deals out of 1,442 listings starting at $1,750
Used Lincoln Town Car"
122 Great Deals out of 2,958 listings starting at $1,999
Used Chevrolet Impala"
1,756 Great Deals out of 55,005 listings starting at $999
Used Dodge Charger"
830 Great Deals out of 30,098 listings starting at $2,950
Used Ford Mustang"
1,072 Great Deals out of 23,465 listings starting at $950
Used Cadillac DTS"
155 Great Deals out of 2,483 listings starting at $3,500
Used Chrysler 300"
741 Great Deals out of 22,753 listings starting at $3,000
Used Honda Accord"
1,444 Great Deals out of 66,644 listings starting at $995
Used Ford Taurus"
634 Great Deals out of 18,232 listings starting at $800
Used Ford F-150"
2,222 Great Deals out of 179,533 listings starting at $1,295
Used Nissan Maxima"
690 Great Deals out of 19,329 listings starting at $946
Used Cadillac CTS"
495 Great Deals out of 19,731 listings starting at $3,490

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
38 listings starting at $11,995
2010 Mercury Grand Marquis For Sale
5 Great Deals out of 114 listings starting at $9,995
2009 Mercury Grand Marquis For Sale
7 Great Deals out of 166 listings starting at $8,990
2008 Mercury Grand Marquis For Sale
15 Great Deals out of 296 listings starting at $5,750
2007 Mercury Grand Marquis For Sale
14 Great Deals out of 237 listings starting at $4,982