2003 deville rear ac issues
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 2003 deville rear ac issues in Past Cadillac Vehicle Discussion; hello i have a 2003 deville and i been having problems with the rear ac unit sometimes it blows really ...
  1. #1
    edward2010 is offline Cadillac Owners Member
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    Question 2003 deville rear ac issues

    hello i have a 2003 deville and i been having problems with the rear ac unit sometimes it blows really hot air while the ac is on and other times it blows correctly when the ac is on i am really stumped on this issue please if someone can help that would be great thank you. Edward

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  3. #2
    basscatt's Avatar
    basscatt is offline Cadillac Owners Master
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    Re: 2003 deville rear ac issues



    check for Diagnostic Trouble Codes -

    if you don't know how - go here and read the ENTIRE post -

    http://www.cadillacforums.com/forums...odes-dtcs.html

    if you have any codes - post them here -
    ALONG WITH THEIR DEFINITIONS -

  4. #3
    edward2010 is offline Cadillac Owners Member
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    Re: 2003 deville rear ac issues

    hello thank you for a quick response i have no codes on the car if i did it would help i have codes in history

    ddm-p1540
    imp-b0429
    u1064
    irc-u1016
    msm-b11850
    b3832
    sdm-b0041
    sdm-b0058

    if this helps at all just a reminder they are not current codes thank you Edward

  5. #4
    MoistCabbage's Avatar
    MoistCabbage is online now Cadillac Owners 10000+ Posts
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    Codes are meaningless without their definitions. Always include definitions when posting codes.

    B0429 is your problem, common in '00-'05 Devilles. You described an intermittent problem, so the code will only be current when the problem exists.

  6. #5
    edward2010 is offline Cadillac Owners Member
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    Re: 2003 deville rear ac issues

    i have looked over all the codes and this is what i see that has anything to do with the ac system

    DTC P1540 Air Conditioning (A/C) Refrigerant Overpressure - Air Conditioning (A/C) Disabled

    DTC B0429 Temperature Control #3 Rear Circuit Range/Performance

    and the second one you have listed any idea on how to fix this problem thank you Edward

  7. #6
    basscatt's Avatar
    basscatt is offline Cadillac Owners Master
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    Re: 2003 deville rear ac issues

    do a search in this forum under
    DTC B0429 Temperature Control #3 Rear Circuit Range/Performance

    it has been discussed often

  8. #7
    edward2010 is offline Cadillac Owners Member
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    Re: 2003 deville rear ac issues

    OK thank you very much for all the help

  9. #8
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
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    Re: 2003 deville rear ac issues

    #47 is the offending actuator.


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