2003 Grand Marquis A/C Blower Acting Weird

295

Asked by Jul 05, 2013 at 04:47 PM about the 2003 Mercury Grand Marquis GS Convenience

Question type: Maintenance & Repair

This is something that has been happening for about a year/year and a half. I will have my
A/C running and it will be running normal, then I will open my windows while driving and
depending on how long I keep my windows open, when I close the windows, the A/C does
not blow that much out of the vents, even when I put the air on high. What can be causing
this. Also, the temperature of the air is not effected by this, only the blowing of the air.

The other issue I have been having is that one vent will blow out most of the air and the other
3 vents will blow out a little bit of air. I have to keep the vent that blows out the most air off in
order for the other 3 vents to blow out close to normal. What can be causing this? I asked
my friend's dad and he specializes in the Grand Marquis/Crown Victorias and he could find
out what the problem is or what is causing it. Again, the temperature of the air is not
effected by this, only the blowing of the air.

Thanks for any help you can give.

2 Answers

my best guess is that you may have a rodent that has built a nest inside your plenum chamber,hope this helps

72,315

Beginning in 1973 cars were required to have "positive airflow" through the passenger compartment. To prevent the build up of deadly exhaust gases in the passenger compartment. This is still true today. This is accomplished by a one way air valve or valves. When the car is moving forward or the climate controll blower is on fresh air enters the passenger compartment at the base of the windshield, passes through the passenger compartment, and exits through a small "flapper" door located on an exterior wall of the trunk. If the vehicle is a van type this door is located in the rear end area exterior wall. Sounds like your "flapper" door is sticking or clogged with debris. Some older vehicles had nocieable grilles in the door jam area. That was the same thing. A one way air valve. HTH. -Jim

Your Answer

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    5,840
  • #2
    kbro
    Reputation
    2,150
  • #3
    Js08016
    Reputation
    1,920
View All

Related Models For Sale

Used Lincoln Town Car
34 Great Deals out of 1,737 listings starting at $1,099
Used Ford Crown Victoria
4 Great Deals out of 963 listings starting at $1,496
Used Chevrolet Impala
570 Great Deals out of 34,340 listings starting at $890
Used Ford F-150
3,132 Great Deals out of 219,096 listings starting at $1,200
Used Ford Mustang
596 Great Deals out of 38,611 listings starting at $1,895
Used Chevrolet Tahoe
783 Great Deals out of 41,561 listings starting at $1,987
Used Ford Taurus
235 Great Deals out of 14,954 listings starting at $1,800
Used Honda Accord
1,092 Great Deals out of 71,806 listings starting at $850
Used Lincoln Continental
16 Great Deals out of 3,403 listings starting at $32,794

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
3 Great Deals out of 29 listings starting at $5,450
2010 Mercury Grand Marquis For Sale
6 Great Deals out of 94 listings starting at $4,688
2009 Mercury Grand Marquis For Sale
82 listings starting at $2,995
2008 Mercury Grand Marquis For Sale
8 Great Deals out of 153 listings starting at $800
2007 Mercury Grand Marquis For Sale
8 Great Deals out of 141 listings starting at $1,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.