Heat comes out even with air conditioning on

Asked by Jul 05, 2017 at 08:43 PM about the 1999 Mercury Grand Marquis 4 Dr GS Sedan

Question type: Maintenance & Repair

2 Answers

254,205

Probably low on refrigerant. Have the A/C system checked out.

45

Check obvious stuff, like no or low refrigerant, and fuses. Same problem on my 1991 was the Temperature Blend Actuator, This controls the door in the plenum which in turn controls which is sent thru to the cabin.. A/c or Heat.Unfortunately requires a partial removal of the Dash ( Instrument panel.) Complicated even more with a passenger airbag.

1 of 1 people found this helpful.

Your Answer

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    5,730
  • #2
    kbro
    Reputation
    2,130
  • #3
    Js08016
    Reputation
    1,870
View All

Related Models For Sale

Used Ford Crown Victoria
5 Great Deals out of 1,187 listings starting at $2,900
Used Lincoln Town Car
28 Great Deals out of 1,755 listings starting at $1,500
Used Chevrolet Impala
508 Great Deals out of 33,660 listings starting at $950
Used Ford F-150
2,270 Great Deals out of 181,767 listings starting at $1,000
Used Ford Mustang
683 Great Deals out of 38,339 listings starting at $895
Used Honda Accord
1,065 Great Deals out of 60,939 listings starting at $999
Used Chevrolet Tahoe
658 Great Deals out of 39,350 listings starting at $1,000
Used Ford Taurus
254 Great Deals out of 16,500 listings starting at $1,850
Used Cadillac DeVille
4 Great Deals out of 1,634 listings starting at $1,995
Used Lincoln Continental
17 Great Deals out of 4,318 listings starting at $35,999

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
25 listings starting at $5,450
2010 Mercury Grand Marquis For Sale
3 Great Deals out of 90 listings starting at $3,490
2009 Mercury Grand Marquis For Sale
4 Great Deals out of 82 listings starting at $2,899
2008 Mercury Grand Marquis For Sale
9 Great Deals out of 160 listings starting at $2,995
2007 Mercury Grand Marquis For Sale
5 Great Deals out of 113 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.