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Water heater not kicking on

We have a Rinnai natural gas water heater. Earlier this evening, while my daughter was in the shower, the hot water stopped. It came back on a while later, but then when I was in the shower, it stopped again, and hasn't come back on. We are having extreme cold temperatures (around -10) right now, so I don't know if that has anything to do with it, but nothing seems amiss when I check it out. Of course, I don't really know what to look for.

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  • lisagv Jan 16, 2009

    I have the EXACT same problem - NO water comes out of any of the hot water taps - they are dry. It is 4 degrees above here, but that is very cold for GA.

    Water comes out of the cold water taps with no problem - but our hot water tap is dry.

    We have had our Rinnai tankless water heater for a few years now and never had a problem with it.

    HELP! :(

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Could be the water supply into the heater after the cold supply to the house has frozen up. Sounds like an ice block has moved down the pipe before the heater while the water to the shower was flowing and then got lodged in an elbow blocking the flow.

Posted on Jan 20, 2009

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