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tim shook
tim shook Posted on Jul 14, 2012
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Air Con on my 2009 Mercury grand marquis is giving me problems. Cold air blows out the defrost vents but will not blow out the main vents. Please advise

Air con is blowing cold air out foot vents and defrost vents but not out the main vents. car takes a long time to cool off on very hot days.

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2 Answers

Anonymous

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  • Posted on Jul 14, 2012
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The blend door in the lwr air vents is stuck it should be down by the squerrl cage also it could be electronically controlled

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  • Posted on Sep 17, 2012
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Why does my 2009 mercury grand marquis blow from the defoster and floor vents but not out the air condition vents

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ginko

Ginko

  • 19396 Answers
  • Posted on Nov 18, 2009

SOURCE: 2003 mercury grand marquis LS

The blend door is stuck in cold position. That usually happens because the blend door actuator has failed.

You will need to test and replace the blend door actuator.

To replace the actuator you will need to take apart the dash and remove completely the instrument panel,d isconnect the connector, remove the four screws, remove the temperature blend door actuator and replace it.

The replacement is not a job for beginners, since you have to take apart the dash to access the actuator.

Regards.

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Anonymous

  • 1 Answer
  • Posted on Feb 01, 2009

SOURCE: Faulty Fan Heater - The main vents are just blowing out cold air.

Go to your idrive., climate the vent settings. you will see a person along with vent areas on the side.
If this persons color is blue it blows cold air so turn the dial for vent closest to that person until the
color changes red then hot air comes out on the vents for driver and passenger. Then let me know.

Mark
2006 BMW 530i sport

Rick Gillis

  • 37 Answers
  • Posted on Dec 06, 2008

SOURCE: Heat wont blow through heater or defroster vents

The door in the heater box is most likely stuck. It is located under the dash on the passenger side

Anonymous

  • 20 Answers
  • Posted on Feb 23, 2009

SOURCE: Heat wont blow through heater or defroster vents

common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost.

Anonymous

  • 42 Answers
  • Posted on Jun 02, 2009

SOURCE: ac vent problem

Damper/flap for driver's side is probably stuck. Try moving the selector from cold to hot several times. Also, move the recirc/outside air control if the previous doesn't work.

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My 2007 grand marqis only blows hot air from the defroster vents. will not blow any cold air. Need help before spending a lot of money taking out the dash.
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NO HEAT ON FLOOR VENTS

---------

As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----

2000 Toyota Avalon: No heat on Passenger Side?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html


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http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

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http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

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http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

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http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

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http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

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1992 Toyota Camry: A/C Control light Flashing and A/C not Blowing Cold?

http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

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http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html

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http://technoanswers.blogspot.com/2012/01/forf-f150-ac-only-blows-through-defrost.html

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These will help.

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Read full answer
Nov 28, 2012 • Cars & Trucks
0helpful
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No heat from vents

As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----

2000 Toyota Avalon: No heat on Passenger Side?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html

------------

No heat on Oldsmobile Silhouette?


http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

------------

Heater blows cold?

http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

-----------

Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

----------

Hot air on the driver's side vents only?

http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

--------------

Temperature gauge does not move and no heat when heater is ON?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

-----------

1992 Toyota Camry: A/C Control light Flashing and A/C not Blowing Cold?

http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

--------------


No heat, blower blows only cold?

http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html
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Ford F150 Ac only blows through defrost vents?

http://technoanswers.blogspot.com/2012/01/forf-f150-ac-only-blows-through-defrost.html

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Dodge A/C come out of defrost vents only?

http://technoanswers.blogspot.com/2012/01/dodge-ac-come-out-of-defrost-vents-only.html

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Ac vacuum line on dodge cummins?

http://technoanswers.blogspot.com/2012/01/ac-vacuum-line-on-dodge-cummins.html

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Ford ranger AC blows cold through defrost vents instead on cabin vents?

http://technoanswers.blogspot.com/2012/01/ford-ranger-ac-blows-cold-through.html

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2005 Chrysler PT Cruiser: A/C Blows Warm?

http://whoisbyme.blogspot.in/2012/06/2005-chrysler-p8t-cruiser-ac-blows-warm.html


-------------

2009 Mercury Grand Marquis: A/C blows Cold From Defrost Vent Only?

http://whoisbyme.blogspot.in/2012/06/2009-mercury-grand-marquis-ac-blows.html

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AC not blowing through Vents on 2007 Chevy Trailblazer?

http://schematicsdiagram.blogspot.in/2012/04/ac-not-blowing-through-vents-on-2007.html

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Passenger side temperature is warm air out of dash vents?

http://schematicsdiagram.blogspot.in/2012/04/passenger-side-temperature-is-warm-air.html

----------


These will help.

Thanks.

Read full answer
Nov 28, 2012 • 2006 Ford Taurus
0helpful
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The vent function no longer works, i.e. won't blow
manual or electronic heater/A/C controls?

Could be loose vacuum harness on back of control head. Need to put 10" tie straps on to hold it tight to control head.
Read full answer
May 09, 2010 • 2004 Mercury Grand Marquis
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Air only blows to defrost
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Aug 06, 2009 • 1984 Mercury Grand Marquis
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Jul 05, 2009 • 2003 Mercury Grand Marquis
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A/c working, only blowing hot air on 2003 mercury
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Jun 27, 2009 • 2003 Mercury Grand Marquis
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2000 Mercury Grand Marquis will only blow hot air when ac is on. The ac system does work lines get cold but will not blow nothing but hot air. Has automatic climate control system. Will direct air from...
needs re-gassing because one line should be hot (feed) and the return cold , This is a specialist job do not attempt to do it yourself because its extremely dangerous with very high pressures involved
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Jun 21, 2009 • 2000 Mercury Grand Marquis
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