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Rannai R85

When the Hot water demand reduces the fan runs faster and blows out the flame. Then I get an error 12. If I keep the hot water flow up than it works fine.


  • Alan (California Radiant) Forbes
    If nobody responds here, call Rinnai at (800)621-9419 and ask for technical support.
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • Samd
    Samd Member Posts: 2
    Thank You. Looks like I will have to wait until Monday.