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How to how to clear the service notification on a Navien NCB-240

Chris Alonzo
Chris Alonzo Member Posts: 50
in Domestic Hot Water

I am the homeowner of 2-year-old Navien NCB-240. I flushed the heat exchanger with descaler after year 1, but there was never any message that service was needed. At year 2 I got a wrench icon and it said service was needed. I flushed it again, but cannot figure out how to clear the wrench icon. There are no errors other than when it was initially installed. Please help.

Comments

  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 10,367

    Duct tape is good for that.

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

    Chris AlonzoPeteA
  • Larry Weingarten
    Larry Weingarten Member Posts: 3,798
    edited April 13

    Hi, If the tape doesn't work, maybe something here will: https://mans.io/files/viewer/460915/58 . 😎

    Yours, Larry

  • HVACNUT
    HVACNUT Member Posts: 6,712

    There is an error. The boiler can still maintain "basic" operation if it's the wrench icon only, no code. If pressing the reset doesn't clear it, then get it checked with a manometer, electrical meter, and combustion analyzer. It should be professionally maintained anyway. There's more than just flushing the HX.

    EdTheHeaterManChris Alonzo
  • EdTheHeaterMan
    EdTheHeaterMan Member Posts: 10,367
    edited April 13

    Seriously, aside from covering it with duct tape… if this does not help, then you require a professional service to find the problem and clear the error.

    Screenshot 2025-04-13 at 12.11.39 PM.png

    Press the reset button on the front display panel.

    This info is available on page 7 and 8 of the User's Info Manual

    Hope this helps/

    Edward Young Retired

    After you make that expensive repair and you still have the same problem, What will you check next?

  • Chris Alonzo
    Chris Alonzo Member Posts: 50

    Will resetting the boiler affect any of the parameters set by the installer?

  • Chris Alonzo
    Chris Alonzo Member Posts: 50
    https://forum.heatinghelp.com/discussion/comment/1852167#Comment_1852167

    Are you saying that the wrench icon is not to tell you to perform regular maintenance? There is a setting called "Service Notification Time".

  • SuperTech
    SuperTech Member Posts: 2,579

    It's telling you that something is wrong and it needs professional repair. Resetting it will only clear it until the problem occurs again. It won't affect the parameters and installation settings.

  • Chris Alonzo
    Chris Alonzo Member Posts: 50

    Thanks. FYI - I have an NCB-H, which doesn't have a separate reset button. But I found in my user manual that the Return Arrow button also acts as a Reset button.

    The wrench icon is gone now. We'll see if it comes back again.

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