2004 Mercury Marque. Air conditioning only comes on ful blast. The dial does not work. Is this something I can fix myself?? I f so, PLEASE tell me the part and where I can find it.

20

Asked by Aug 31, 2016 at 12:03 PM about the 2004 Mercury Grand Marquis

Question type: Maintenance & Repair

10 Answers

7,995

does the dial not work or is the resistor bad

50,755

It is possible the blower motor control unit has gone bad. The blower motor control is under the hood sort of behind the passenger side cam cover on the firewall. Sometimes you can tap on the module and make the blower speeds work for a few minutes or longer. If tapping on the module changes the speed then the module needs to be replaced. Photo from www.tascaparts.com

Best Answer Mark helpful
7,995

does it have automatic climate control

1 of 1 people found this helpful.
50,755

Bad solder joints are the normal failure point with these modules. Certainly there could be a problem with the blower switch or the EATC unit if equipped with ATC.

1 of 1 people found this helpful.
20

crumbob - yes, it does have automatic control

1 of 1 people found this helpful.
20

Bob, Is this something I will be able to change myself?

1 of 1 people found this helpful.
50,755

Yes if the part is bad you can change it yourself. It is not really easy, but doable by the average person with some mechanical knowledge and the tools necessary. Always disconnect the negative battery terminal when working on the electric system.

50,755

Here is a video on how to remove the blower motor control.....https://www.youtube.com/watch?v=JFq2mvfSBdk

1 of 1 people found this helpful.
50,755

For an overview on how to run a self test on the EATC module (temperature display and fan unit) go to this link....http://www.crownvic.net/ubbthreads/ubbthreads.php? ubb=showflat&Number=2357073

20

Bob, you are amazing!!!! THANK YOU so VERY MUCH!!!!!! This is actually for my mother. She keeps getting ripped off from these auto shops and it never gets fixed.

Your Answer

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 1,745 nationwide Grand Marquis listings starting at $1,700.

ZIP:

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    5,700
  • #2
    kbro
    Reputation
    2,120
  • #3
    Js08016
    Reputation
    1,840
View All

Related Models For Sale

Used Ford Crown Victoria
12 Great Deals out of 1,218 listings starting at $1,995
Used Lincoln Town Car
37 Great Deals out of 1,776 listings starting at $1,495
Used Chevrolet Impala
591 Great Deals out of 34,660 listings starting at $1,000
Used Chevrolet Tahoe
624 Great Deals out of 36,241 listings starting at $1,800
Used Ford F-150
2,236 Great Deals out of 181,369 listings starting at $1,500
Used Chrysler 300
360 Great Deals out of 16,732 listings starting at $1,000
Used Ford Taurus
252 Great Deals out of 17,902 listings starting at $1,499
Used Ford Mustang
759 Great Deals out of 42,755 listings starting at $1,300
Used Honda Accord
1,019 Great Deals out of 62,743 listings starting at $999
Used Chevrolet Silverado 1500
2,146 Great Deals out of 183,298 listings starting at $1,693
Used Buick LeSabre
24 Great Deals out of 1,873 listings starting at $1,588
Used Cadillac DeVille
1,666 listings starting at $1,995

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
3 Great Deals out of 24 listings starting at $5,450
2010 Mercury Grand Marquis For Sale
79 listings starting at $3,990
2009 Mercury Grand Marquis For Sale
3 Great Deals out of 87 listings starting at $2,900
2008 Mercury Grand Marquis For Sale
8 Great Deals out of 147 listings starting at $2,250
2007 Mercury Grand Marquis For Sale
10 Great Deals out of 118 listings starting at $1,700

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.