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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  • 77,194 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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