error 12

  1. Michael Lance

    Rinnai R75LSi Error Code 11/12

    I have a Rinnai R75 LSi, date May 2008, installed new in 2008. I had a code 11 on it a few years back, cracked it open, and found the fan full of stink bugs. Cleaned it, and it fixed things up. Now I periodically clean the fan. A few weeks ago, one of my 6 year olds decided the exhaust needed...
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