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Rinnai R75LS code 12

LorenMatson Member Posts: 2
edited April 2015 in Domestic Hot Water
I have a Rinnai R75LS that has worked perfectly for 6 years. Now getting no hot water and a code 12. Unit did come on once when powering unit up when water supply was turned on. Other than that one time, unit gets a flame for a couple of seconds and then goes to code 12?



  • LorenMatson
    LorenMatson Member Posts: 2
    thanks...cleaned the burner and fan...appears to be working fine.
  • j a_2
    j a_2 Member Posts: 1,796