Question about 2002 Mercury Grand Marquis

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I can't find the heater control valve in my 2002 Grand Marquis LS where is it?

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6ya6ya
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Posted on Jan 02, 2017

  • 15 Answers

SOURCE: power window won't work but motor runs

Gear in motor stripped or regulator

Posted on Nov 18, 2008

  • 43 Answers

SOURCE: Cruise Control - 2000 Mercury Grand Marquis LS - not working

Your manual should tell you that. Also check your brake light switch by the brake pedal. It also disengages the cruise. If it is bad the cruise will not work but the brake lights may still work.

Posted on Jul 03, 2009

  • 83 Answers

SOURCE: 2000 grand marquis cruise control not working

Have seen this problem before. You need to look under dash at brake pedal and find a blue switch with plunger contacting pedal, disconnect connector and jump with a peice of wire and drive to see if cruise works and if it does replace deactivation switch this should get you going.

Posted on Aug 26, 2009

ginko
  • 19396 Answers

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.


Posted on Nov 18, 2009

Shadowloo
  • 31 Answers

SOURCE: 2003 Grand Marquis LS Ultimate ac switches from

Does it only change when going uphill, or under heavy acceleration? Or is it just when ever it feels like it? Generally, it's vacuum controlled and on a Ford, loss of vacuum when accelerating or pulling a grade under heavy loads can be normal, causing the air to come out of the defrost. To answer your question, the blower door is located in the dash, generally behind the radio area.

Good luck!

Posted on May 22, 2010

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---------
multi diag access

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I have no heat blowing into my 2002 Mercury Grand Marquis.


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Oct 22, 2011 | 2000 Mercury Grand Marquis

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The a/c is cooling the care but it is blowing out of the defroster not the vents, whats wrong? 2005 LS Grand Marquis


you have a vacuum leak between the engine and the control head for the a/c controls. Sometimes the vacuum harness does not fit tight to the back of the head. I have used plastic tie straps to hold it tight. Also, sometimes the little valves in the control head leak. Gino on ebay repairs them for $150.

I have pictures but they are 2 mb and won't go here.

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1998 mercury grand marquis heater doesnt work only cold air comes out the air cond works fine the enginecoolant is new, the engine doesnt overheat.


Either your heater control valve is not properly operating or your heater core is clogged. Locate the heater control valve under the hood, should be close to firewall on heater hose, have someone adjust temperature from hot to cold and see if you can see the heater control valve operating if so replace the heater core, if its not doing anything replace it(heater control valve).

Feb 19, 2011 | 1998 Mercury Grand Marquis

1 Answer

Where is the heater control valve located on a 2005 mercury ls ?


you have a air blend door in the plenum, no water valve.

Nov 07, 2010 | 2005 Mercury Grand Marquis

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