2004 GRAND MARQUIS blower motor

Asked by May 25, 2019 at 06:37 PM about the 2004 Mercury Grand Marquis

Question type: Maintenance & Repair

I have a 2004 grand marquis with
automatic temperature control  that
erractically blows air, I have already
changed the blower resistor and
blower motor and problem still exists.
I've read able changing the speed
selector switch but after researching I
dont believe the automatic
temperature control has a switch that
can be changed.

2 Answers

Check and see if there is a control valve in one of the heater hoses, if it does this might be bad. Also check the switch for the blower motor it might have a short.


Sounds like the control module under the hood is bad. It's located on the firewall about center. Usually when it fails the system defaults to high blower speed though. Hope that helps! Jim

Your Answer:

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
  • #2
  • #3
View All

Find great deals from top-rated dealersTM


Related Models For Sale

Used Lincoln Town Car
13 listings
Used Chevrolet Impala
19 Great Deals out of 780 listings starting at $2,495
Used Chrysler 300
44 Great Deals out of 925 listings starting at $3,995
Used Ford F-150
128 Great Deals out of 13,175 listings starting at $1,000
Used Chevrolet Tahoe
17 Great Deals out of 1,084 listings starting at $5,888
Used Ford Taurus
23 Great Deals out of 411 listings starting at $4,500
Used Chevrolet Silverado 1500
85 Great Deals out of 14,521 listings starting at $3,995
Used Ford Mustang
56 Great Deals out of 1,887 listings starting at $3,995
Used Toyota Camry
48 Great Deals out of 1,497 listings starting at $3,495

Used Cars for Sale

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. Content will be removed if CarGurus becomes aware that it violates our policies.