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Lochinvar Noble Flame Fail error

Le John
Le John Member Posts: 211
I have a six month old Lochinvar Noble NKC 199 and getting a Flame Fail Error. She lights ramps up and then goes to post purge.


  • Leon82
    Leon82 Member Posts: 684
    Check the connection of the flame sensor.

    If that doesn't work you can remove it and gently cleannit
    Le John
  • Le John
    Le John Member Posts: 211
    Thank you @Leon82 - I'll do that today . The Guys at Lochinvar were very helpful. Lochinvar advised it appeared to be combustion related and had me make very small changes to the throttle adjustment screw. I have it to the point where she stays lit both on high fire and low fire but will need to get a combustion analysis done to make sure she is in acceptable range. I have to say the Lochinvar Noble is very easy to work on.
  • DZoro
    DZoro Member Posts: 1,048
    Don't forget to check the incoming gas pressure, during high and low fire. Have them leave the combustion report inside the boiler. Should be 2 analysis, high and low fire, and also have them write down the flame current during both firing rates.
    Le John