Question about Noritz 6.3 Gallon Residential Tankless Water Heater - N-063S

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Water Heater Won't Fire up

I have a Noritz Tankless Water Heater... it won't turn on.  no blinking light. I have power to the unit but still no spark... think maybe there might be debris clogging the unit? need help! AOS Smith Promax water heater won't fire

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  • Ned C Cook
    Ned C Cook May 11, 2010

    you have power, so this is and electric heater?

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Do you get any water out of the hot water side of any of your faucets? sometimes the flow sensor on the cold water side of the heater will jam with hard water or debris and this will cause the heater not to turn on when you run the hot water. you can also check the filter on the cold water side for debris as well.

Posted on Aug 01, 2009

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Does the fan come on? this has to happen before it will even try to start if it doesn't your problem goes farther into the unit,, normal pracess if the fan then the ignitor then the flame, It could be in the circuit board most people that have gone with the tankless don't clearly ask the question but that is normal, but if you could clearify the procedure of what it is doing to this point i could be more helpful to you---- e-mail me what is happeing diffrent then what it use to do gary1121@aol.com

Posted on Jun 11, 2009

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I have a Noritz tankless water heater (model n-132m). I am getting an error code of 71. What does that mean?


The Noritz Manual shows fixed for the following error codes:
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For all other codes this is the recommendation:
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