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Rinnai ru98

We have a rinnai ru98 that has worked great for three years. Last week for the first time the water would not warm up. I unplugged the unit and plugged it back in and everything seemed to work fine again. About a week later the same thing happened. The unit was flashing error code 11. I unplugged the unit and plugged it back in and it is working again. I have a feeling it will happen again soon.I read through the manual and saw that it can be the igniter. how do I test the igniter to see if that is the issue. Thanks for any advice.


  • kcopp
    kcopp Member Posts: 4,443
    the igniter may just need a good cleaning. use a dollar bill to clean off any reside. The manual should tell you what covers to pull off to gain access.
  • pkover3
    pkover3 Member Posts: 2
    I will give that a try. Thanks kcopp.