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Rinnai RUCS65i - have to cycle power to restart
This is an indoor unit but when the temp gets down to the 30's the unit tends not to start. I can unplug and plug back in and it will start most of the time. It might be a coincidence with the temp. I have performed all the flushing and cleaning of filters. No error codes and nothing at all on the small screen.
I am thinking a bad pc board, freeze sensor. Thoughts?