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

116,035

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 people found this helpful.
1,060

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 people found this helpful.

Your Answer:

Mercury Grand Marquis Experts

  • #1
    Tracy Hooks
    Reputation
    6,050
  • #2
    kbro
    Reputation
    2,230
  • #3
    Js08016
    Reputation
    2,060
View All

Related Models For Sale

Used Lincoln Town Car
29 Great Deals out of 1,466 listings starting at $1,900
Used Ford Crown Victoria
737 listings starting at $3,000
Used Chevrolet Impala
375 Great Deals out of 25,639 listings starting at $950
Used Ford F-150
2,300 Great Deals out of 208,487 listings starting at $1,300
Used Chevrolet Tahoe
523 Great Deals out of 37,993 listings starting at $1,243
Used Ford Mustang
266 Great Deals out of 37,717 listings starting at $1,350
Used Toyota Camry
761 Great Deals out of 72,914 listings starting at $1,000
Used Honda Accord
574 Great Deals out of 103,381 listings starting at $950
Used Cadillac DeVille
1,270 listings starting at $2,300
Used Ford Taurus
194 Great Deals out of 15,823 listings starting at $600
Used Chevrolet Caprice
146 listings starting at $9,993

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
18 listings starting at $5,888
2010 Mercury Grand Marquis For Sale
6 Great Deals out of 66 listings starting at $3,995
2009 Mercury Grand Marquis For Sale
58 listings starting at $2,977
2008 Mercury Grand Marquis For Sale
5 Great Deals out of 106 listings starting at $3,000
2007 Mercury Grand Marquis For Sale
6 Great Deals out of 97 listings starting at $2,995

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.