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I'M BAACK. RINNAI E50 CRN E2 problem

nibs
nibs Member Posts: 516
edited February 2024 in THE MAIN WALL
Last night my Rinnai E50 boiler decided to have a problem, the heater started flashing an E2 error. After about 5 years of trouble free service, it did it maybe a month ago flashed the E2 hit the reset button and it started up and ran for a month as normal and last night it flashed E2 again, have tried the reset button about 4 times til about 2 in the morning. Trying again now Saturday.
ANY TIPS on what it may be?

Thinking it's either gas supply regulator, ignitor or circulating pump.

After being helped here tremendously with designing and building my home's hydroponic heating and domestic water systems resulting in a beautifully heated warm home, I hope someone with Rinnai experience can steer me back onto the straight and narrow.
Regards Tony Aldridge.

Comments

  • dko
    dko Member Posts: 668
    This error code?

  • nibs
    nibs Member Posts: 516
    @ dko
    dko said:

    This error code?

    Yep thats the one.
  • rcassin
    rcassin Member Posts: 1

    I have the same problem. Did you fix it? Thanks, Rob

  • Teemok
    Teemok Member, Email Confirmation Posts: 760

    In addition to flame rod cleanliness, these aluminum heat exchanges need cleaning from time to time. They plug up and the air fuel combustion mixture falls off spec enough that they can't hold a flame in some conditions.

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