why does my air condition keep blowing heat when i turn it on air condition

Asked by Mar 07, 2015 at 08:56 PM about the 1997 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

the air condition keep blow heat even when i turn in on air condition. the compresser is turning, and the lines are cold but the air want come out cold

2 Answers

102,225

The most likely problem is a heater door failure, if you have an HVAC system it could be a failed servo motor failure, if you don't it could be a vacuum problem with the mode switching.

1 of 1 people found this helpful.
970

Older vehicles used manual cables to open and close the doors, so I'd look in that area if you have manual controls, otherwise look into what is controlling the door to divert the incoming air supply source properly.

1 of 1 people found this helpful.

Your Answer

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    5,780
  • #2
    kbro
    Reputation
    2,150
  • #3
    Js08016
    Reputation
    1,880
View All

Related Models For Sale

Used Lincoln Town Car
45 Great Deals out of 1,758 listings starting at $1,000
Used Ford Crown Victoria
4 Great Deals out of 1,049 listings starting at $1,496
Used Chevrolet Impala
542 Great Deals out of 35,256 listings starting at $900
Used Ford F-150
2,573 Great Deals out of 199,178 listings starting at $1,300
Used Ford Mustang
593 Great Deals out of 36,388 listings starting at $899
Used Chevrolet Tahoe
730 Great Deals out of 41,715 listings starting at $1,995
Used Cadillac DeVille
1,548 listings starting at $2,995
Used Lincoln Continental
17 Great Deals out of 3,857 listings starting at $35,890
Used Chevrolet Caprice
199 listings starting at $9,995
Used Ford Taurus
185 Great Deals out of 15,897 listings starting at $1,850
Used Buick LeSabre
18 Great Deals out of 1,771 listings starting at $1,000

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
29 listings starting at $5,450
2010 Mercury Grand Marquis For Sale
4 Great Deals out of 94 listings starting at $4,795
2009 Mercury Grand Marquis For Sale
8 Great Deals out of 85 listings starting at $2,599
2008 Mercury Grand Marquis For Sale
9 Great Deals out of 155 listings starting at $2,790
2007 Mercury Grand Marquis For Sale
9 Great Deals out of 129 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.