Question about 2003 Mercury Grand Marquis

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Climate control codes

I need the code and the method of input for my 2003 Mercury Marquis climate control to manually move the blend door. At the moment I only get cool or cold air even when the temperature calls for heat.

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  • nubblebear Sep 09, 2008

    no, I do not have a manual other than the owners manual that came with the vehicle.

  • yadayada
    yadayada May 11, 2010

    Do you have a manual?

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  • 60,667 Answers

I have checked every site that I can think of and run the question many times, unable to get the procedure, maybe a nice tech at the local dealer will help u out, if not I guess buying a service manual might be your only option. I am a retired Ford mechanic, I did almost all the AC work, I never found this problem was a control head issue, it was always the blend door electric motor, I think you can see it from the glove box if you remove the liner.

Posted on Sep 09, 2008

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1 Answer

How do you know if you need a manual blend door actuator


Look At It When Moving Controls--You Should See It Move. NOTE: If Blend Door Itself Is Seized Due To Case Problem It Will Damage Actuator (not a uncommon problem)

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Need manual code to blend door, my ex had it, and fixed it, but it only lasts for 80 starts. it was stuck on air conditioning now it switched to heating, but i want it back to AC thank you


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press."off "and "floor" at the same time release... then hit the "auto" button
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2003 mercury grand marquis LS heater does notr blow hot air, blower blows but cold air comes what is the problem


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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1 Answer

Purchased a used 2006 Mercury Grand Marquis, did not have an original owners manual with factory code card in pack ( ordered an owners manual on line ) my question is how do I program the driver door...


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The second and hardest method is to remove the driver's door panel to access the driver's door module and there will be a tag on it with the 5 digit code.
Yes you can program your own code into it however you must have the original code .Input the original code then hit the number 2 button then put in your own 5 digit code.This code will remain until you disconnect the battery or battery goes dead then it reverts back to the original.
You can also go to this website and download your owners manual for free. Just pick owner guide in the left task bar and input your vehicle information.

http://www.genuineservice.com/genuineservice/en/default?page=genuineService

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1 Answer

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