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

220,525

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.

Your Answer:

CarGurus Experts

  • #1
    Tracy Hooks
    Reputation
    9,670
  • #2
    Trippmeister
    Reputation
    5,040
  • #3
    Bob Beaman
    Reputation
    3,740
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Lincoln Town Car
4 listings starting at $9,995
Used Ford Crown Victoria
2 listings starting at $8,960
Used Ford F-150
343 Great Deals out of 12,723 listings starting at $599
Used Ford Mustang
54 Great Deals out of 1,606 listings starting at $6,200
Used Toyota Camry
45 Great Deals out of 1,150 listings starting at $3,900
Used Chevrolet Impala
9 Great Deals out of 138 listings starting at $3,990
Used Buick LeSabre
2 listings
Used Lincoln Continental
9 listings starting at $13,030
Used Chevrolet Tahoe
18 Great Deals out of 859 listings starting at $9,980
Used Chevrolet Silverado 1500
213 Great Deals out of 9,034 listings starting at $2,900
Used Ford Explorer
57 Great Deals out of 2,220 listings starting at $7,990

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.