1999 grand marquis

Asked by 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

69,725

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

1 of 1 people found this helpful.

Your Answer

Add photo

Related Questions

Search Mercury Grand Marquis Questions

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 5,460
#2 kbro
kbro
Reputation 2,060
#3 Js08016
Js08016
Reputation 1,770
View All

Related Models For Sale

Used Ford Crown Victoria
12 Great Deals out of 1,069 listings starting at $2,995
Used Lincoln Town Car
33 Great Deals out of 1,820 listings starting at $1,750
Used Chevrolet Impala
521 Great Deals out of 31,726 listings starting at $1,450
Used Ford Mustang
472 Great Deals out of 45,735 listings starting at $1,999
Used Ford Taurus
246 Great Deals out of 20,434 listings starting at $699
Used Ford F-150
2,195 Great Deals out of 206,316 listings starting at $1,499
Used Chevrolet Tahoe
549 Great Deals out of 29,234 listings starting at $1,699
Used Cadillac DeVille
7 Great Deals out of 1,640 listings starting at $1,999
Used Chevrolet Camaro
226 Great Deals out of 30,943 listings starting at $1,217
Used Chevrolet Silverado 1500
1,716 Great Deals out of 175,751 listings starting at $1,250

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
35 listings starting at $4,995
2010 Mercury Grand Marquis For Sale
5 Great Deals out of 90 listings starting at $2,799
2009 Mercury Grand Marquis For Sale
8 Great Deals out of 94 listings starting at $3,790
2008 Mercury Grand Marquis For Sale
11 Great Deals out of 144 listings starting at $2,250
2007 Mercury Grand Marquis For Sale
3 Great Deals out of 140 listings starting at $2,495

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.