Question about Rinnai Unvented Gas Zone Heater. 99% fuel efficient: Blower with Thermostat

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Heater goes off

I have a Rinnai REH-23DFT-N with a serial number of 98.07-000001. It has started shutting itself off and not relighting. Any suggestions?

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Re: Heater goes off

Possibly A bad thermocoupler. It is the part that looks like a stiff solid copper wire with on end sticking in the flame of the pilot light and is a safety feature if the pilot goes out it starts to cool and the resistance changes back you the module and the module shuts the gas off. I have seen these go intermediately faulty in waterheaters and do just what you described.

Posted on Jan 08, 2007

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