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Rinnai Q175S E12 Issue

peterstar
peterstar Member Posts: 2
in Gas Heating
I had a service guy come over today but he has no clue. We have this unit for about 10 years. I start having issue with error code E12 and it says that supply temperature being too high. The flame starts with blue but after a few minutes I see orange flame mostly. I assumed that the it flames up too much and I am trying to find how to reduce so that flame color would be back to blue and possibly I don't get the error code E12.
Vent is clear, pump is working normally. I am searching for the solution to this. If anyone would help me, it would be great.
Thanks,
Pete

Comments

  • Slimpickins
    Slimpickins Member Posts: 348
    A code 12 is flame failure, it could be something as simple as cleaning the flame rod. If you have had this boiler for 10 and never had a good servicing, it's time. I would try to find a tech familiar with wall hung boilers and owns a combustion analyzer. Things to check, flame rod, remove and clean burners, clean and flush condensate trap, check venturi and finally set combustion.

    Good luck!
  • psb75
    psb75 Member Posts: 894
    Rinnai has very good tech support. Have your service person call them if needed.
  • Slimpickins
    Slimpickins Member Posts: 348
    Yes they do have good tech support, I spent 9 years with them until I had to retire for medical reasons.
     
    I forgot to add on my original post to check gas supply press and make sure it's not dropping below 4"w. c. under a big demand.


     
  • peterstar
    peterstar Member Posts: 2
    Thank you for the comments.

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