1999 grand marquis

Asked by Shae Mar 04, 2016 at 11:16 AM about the 1999 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

back in the middle of the winter the ac compresser baring locked up so installed a bypass pully. so only heat worked no cold air. couple days ago i heard a knocking coming from vents turned off the heater and the knocking stopped. turned back on the knocking continued after a while the knocking stopped but the heat stopped working i would have the heat on 90 and on high but cold air blows only..put it on defrost but only blow out of vents... i checked the blower motor and dont think thats the issue... need help i was told might be heater core but looking for second opinion..

1 Answer
223,935

Rowefast answered 8 years ago

Probably the HVAC heater blend door actuator that controls the flow of air, and a HVAC Heater Control Valve that controls the heat.

2 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • 1999 mercury grand marquis 3 Answers

    1999 mercury grand marquis been sitting for maybe two years has high pitched whistle coming from the gas tank area it runs rough at idle but seems to be ok at highway speed any ideas? vacuum leak?

    Mercury Grand Marquis

    -

    Maintenance & Repair

  • 1999 Grand Marquis LS Starting problem 2 Answers

    I have a 1999 Grand Marquis LS. Problem is that when I go to start, I turn the key and nothing happens, unless I either turn the key all the way to back or pull the gear shift up and to the left. Ev...

    1999 Mercury Grand Marquis 4 Dr LS Sedan

    -

    Maintenance & Repair

  • Grand Marquis 1 Answer

    Do a 1997 Grand Marquis parts fit on a 2002 Grand Marquis

    1997 Mercury Grand Marquis

    -

    Maintenance & Repair

  • 95 grand marquis 2 Answers

    Will a 97grand marquis wire harness could crank a 95 grand marquis

    1995 Mercury Grand Marquis

    -

    Maintenance & Repair

  • changed water pump now it turns over but will not start 1999 grand marquis 1 Answer

    1999 grand marquis changed water pump now it turns over but will not start added gas but it acts like its out of gas

    1999 Mercury Grand Marquis 4 Dr LS Sedan

    -

    Maintenance & Repair

Shortcuts

Search Mercury Grand Marquis Questions

CarGurus Experts

  • #1
    Tracy Hooks
    Reputation
    9,860
  • #2
    Trippmeister
    Reputation
    5,150
  • #3
    Bob Beaman
    Reputation
    3,880
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Lincoln Town Car
7 listings starting at $9,995
Used Ford Crown Victoria
5 listings starting at $8,000
Used Ford F-150
338 Great Deals out of 15,311 listings starting at $1,712
Used Chevrolet Impala
8 Great Deals out of 110 listings starting at $1,500
Used Chevrolet Corvette
29 Great Deals out of 1,066 listings starting at $15,871
Used Ford Mustang
62 Great Deals out of 1,288 listings starting at $4,995
Used Toyota Camry
53 Great Deals out of 996 listings starting at $2,212
Used Toyota Tundra
35 Great Deals out of 1,173 listings starting at $8,500
Used Chevrolet Silverado 1500
202 Great Deals out of 5,916 listings starting at $2,975
Used Honda Accord
44 Great Deals out of 913 listings starting at $1,599
Used Cadillac DeVille
7 listings
Used Toyota Avalon
5 Great Deals out of 24 listings starting at $4,988

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.