a/c not blowing out the main vent

Asked by Jun 21, 2013 at 03:09 PM about the 2000 Mercury Grand Marquis LS

Question type: Maintenance & Repair

a/c works great, just not blowing out of main vent. defrost and floor work fine

4 Answers

22,565

Your heater/ac register controls are vacuum actuated. I would start under the hood and locate the vacuum supply coming from the firewall (right side above or near the black plastic heater case) and trace it to a "T". There will be a vacuum line to the intake manifold (supply), and a vacuum line to a vacuum canister or reservoir. There is also a check valve that allows the reservoir to take over in case of a low vacuum signal (like passing or pulling a hill). I work on Crown Victoria Police Interceptors (same car, different badge, more fun). Usually it's a vacuum supply concern - a broken line.

15 out of 15 people think this is helpful.
130

Ac not coming from ac vents

13 out of 13 people think this is helpful.
130

Don't know

10

You could try to see if the solenoids are actuating the control the flappers that change the direction of air flow there's a couple of them. They work off of the vacume system.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • heat and a/c only blowing out of window vent 2 answers

    I only have heat and a/c blowing out of my window vent

    2002 Mercury Grand Marquis LS Premium

    -

    Maintenance & Repair

  • AC/Heater Vents not blowing 1 answer

    I have a 1995 mercury grand Marquis, everything digital...Trying to figure out y don't I have any air or heat coming threw my vent even though I can hear the fan there still no air and the only h...

    1995 Mercury Grand Marquis

    -

    Maintenance & Repair

  • a/c blower vents not switching 8 answers

    I AM HAVING A PROBLEM WITH THE A/C BLOWER NOT BLOWING OUT THE FRONT VENTS. IT IS STUCK ON DEFROST.THIS HAPPENED WHEN IT WAS STILL UNDER WARRENTY ABOUT FIVE YEARS AGO .I WAS DRIVING ALONG AND THE RADI...

    Mercury Grand Marquis

    -

    Maintenance & Repair

  • My heating & cooling system is working but not blowing out. 1 answer

    For a few days it would work then not but now it's consistantly not. I feel the cold air coming from the vents but no blowing force behind it.

    2000 Mercury Grand Marquis

    -

    Maintenance & Repair

  • a/c does not blow from ANY vents...sometimes. 1 answer

    the a/c does not blow out of the vents.

    2000 Mercury Grand Marquis LS

    -

    General

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 2,136 nationwide Grand Marquis listings starting at $1,995.

ZIP:

Search Mercury Grand Marquis Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 5,060
#2 kbro
kbro
Reputation 2,040
#3 Js08016
Js08016
Reputation 1,580
View All

Related Models For Sale

Used Ford Crown Victoria
6 Great Deals out of 1,379 listings starting at $1,700
Used Lincoln Town Car
33 Great Deals out of 2,089 listings starting at $1,995
Used Chevrolet Impala
907 Great Deals out of 35,161 listings starting at $1,700
Used Ford F-150
3,010 Great Deals out of 207,337 listings starting at $1,000
Used Chevrolet Tahoe
813 Great Deals out of 27,743 listings starting at $1,700
Used Honda Accord
1,003 Great Deals out of 74,760 listings starting at $899
Used Cadillac DeVille
5 Great Deals out of 1,955 listings starting at $1,600
Used Buick LeSabre
11 Great Deals out of 2,253 listings starting at $1,299
Used Ford Mustang
537 Great Deals out of 42,625 listings starting at $1,699
Used Toyota Camry
1,128 Great Deals out of 96,508 listings starting at $1,250
Used Chevrolet Silverado 1500
2,541 Great Deals out of 151,790 listings starting at $1,500

Used Cars For Sale

2010 Mercury Grand Marquis LS For Sale
5 Great Deals out of 123 listings starting at $2,999
2009 Mercury Grand Marquis LS For Sale
5 Great Deals out of 89 listings starting at $2,995
2008 Mercury Grand Marquis LS For Sale
5 Great Deals out of 100 listings starting at $2,995