Engine hot ac off
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Cadillac STS-V Series Forum Discussion, Engine hot ac off in Cadillac V-Series Forums; I got this message on my dash engine hot ac off and the engine temp gauge is not working has ...
  1. #1
    iLuvEasy is offline Cadillac Owners Member
    Automobile(s): 2006 STS-V Raven
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    Engine hot ac off

    I got this message on my dash engine hot ac off and the engine temp gauge is not working has anyone experienced this?

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  3. #2
    Berger 93 is offline Cadillac Owners Fanatic
    Automobile(s): Cadillac STS-V
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    Re: Engine hot ac off

    Yup . . thermostat is bad . . typically it is stuck open.

  4. #3
    iLuvEasy is offline Cadillac Owners Member
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    Ok just get one from autozone?

  5. #4
    Guy.Seminerio is offline Cadillac Owners Connoisseur
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    Re: Engine hot ac off

    FYI this happened to me a couple of months ago. I pulled over and did a google search of the error message and the word "cadillacforums." Definitely tstat but some mentioned that for the time being disconnect and reconnect the battery. I did that, message went away and hasn't been back since. We're talking a few thousand miles later.

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    After all, you do love easy.

  6. #5
    iLuvEasy is offline Cadillac Owners Member
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    Well it did rain today so that could be the problem too

  7. #6
    Cadillac Cust Svc's Avatar
    Cadillac Cust Svc is offline Cadillac Customer Service
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    Re: Engine hot ac off

    Quote Originally Posted by iLuvEasy View Post
    I got this message on my dash engine hot ac off and the engine temp gauge is not working has anyone experienced this?
    Hello iLuvEasy,

    I apologize that your engine temperature gauge is not working and you are experiencing this message on your dashboard. I see that you have gotten some great advice from the community. Please keep us updated on this issue and if you decide to take your vehicle to the dealership to address this issue, please feel free to contact us via private message. Thank you very much for your time.

    Gregory W.
    Cadillac Customer Care

  8. #7
    1madstsv's Avatar
    1madstsv is offline Cadillac Owners Connoisseur
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    Re: Engine hot ac off

    Post #50 for this I think now lol.
    Guy.Seminerio likes this.

  9. #8
    iLuvEasy is offline Cadillac Owners Member
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    Thanks I disconnected the battery and it reset it self but I'm still take it to get looked at or a pressure check done on the radiator

  10. #9
    PGA2B's Avatar
    PGA2B is offline Cadillac Owners Connoisseur
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    Re: Engine hot ac off

    Spend the $15 and get a new T-Stat. Take you about 30 minutes to replace it.

  11. #10
    iLuvEasy is offline Cadillac Owners Member
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    Thanks bought one today

  12. #11
    PGA2B's Avatar
    PGA2B is offline Cadillac Owners Connoisseur
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    Re: Engine hot ac off

    Two 10mm bolts hold the housing down. don't worry about removing any hoses.

  13. #12
    theotherguyssn's Avatar
    theotherguyssn is offline Cadillac Owners Fanatic
    Automobile(s): 06 sts-v
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    Re: Engine hot ac off

    ALSO IS A UPDATE FOR THE ENGINE CONTROL MODULE FOR SETTING FAULTY P0128 WHICH IS THERMOSTAT DTC SETTING. i had same problem and found bullentin for installing latest update in the engine control module due to it could cause that message and dtc to set along with putting a new thermostat in mine. would have to take to a dealership less your around columbia sc i could help you out lol

  14. #13
    iLuvEasy is offline Cadillac Owners Member
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    Gasket?

  15. #14
    mjs182004's Avatar
    mjs182004 is offline Cadillac Owners Enthusiast
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    Re: Engine hot ac off

    I didn't replace my gasket, it's a rubber o-ring in the shape on a number 8. weird i know. It took me about 2 hours to do mine, but i took off the two hoses to it and other various ones to gain access to the Tstat housing. I also removed the first part of the air intake, so I could get my fat hands down there. Oh and be careful oh hot coolant, this beast holds its heat for quite a while. And I used one gallon of premixed coolant. Dexcool of course.

  16. #15
    Robert Kimball is offline Cadillac Owners Member
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    I had the same problem. New V owner. Took it to my mechanic and he said just needed a reboot of the computer....$ 100 later. It went away for 5 days and them same error popped up. Read the posts in this forum and disconnected the battery posts as suggested and all is going good....... So far. My mechanic charged me $100 to reset the computer?????

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