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Rinnai tankless water heater malfunction

katya2004
katya2004 Member Posts: 4
in THE MAIN WALL
My tankless water heater suddenly stopped working. No codes flashing. Read the manual and saw the codes are stored so I tried pulling them up and no codes are stored. I've cleaned the filter and that hasn't helped. The unit doesn't even seem to register that the hot water has been turned on. The unit is only 2 years old and was a builder install. How do I fix this?

Comments

  • Snowmelt
    Snowmelt Member Posts: 1,425
    Does it have power? Is it just doing your domestic water.
  • katya2004
    katya2004 Member Posts: 4
    Snowmelt- Yes it does have power. It's our residential water heater, just domestic water.
  • Snowmelt
    Snowmelt Member Posts: 1,425
    Flow sensor or thermistors. How's gas pressure?
  • katya2004
    katya2004 Member Posts: 4
    I am not sure. How or where can I check gas pressure?
  • Snowmelt
    Snowmelt Member Posts: 1,425
    At this point call the company up, they have a 800 number, they will direct you to a local technition, the last Rinnai I worked on I replaced the PC board gas valve and fan, after all that I ended up replacing the unit.
  • katya2004
    katya2004 Member Posts: 4
    Okay. I will give them a try. I think there's still warranty coverage. Thank you!
  • Snowmelt
    Snowmelt Member Posts: 1,425
    Ok, and tell us what it is?

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