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

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We have a noritz tankless water heater that we installed & it stayed on all evening, provided hot water etc. Decided to move the display & turned off. Now when we go to turn it on, it will flash FF on the display for about 5 seconds & then turn off.

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  • Chris Sellers
    Chris Sellers Jul 12, 2010

    you need to disconnect the power whenever connecting or disconnecting the remote. Simply unplug the heater, wait 20 seconds, and the code should be gone when you power it back up.

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Check the wiring connections for your remote. The FF is related to communication problems with the remote. You should also reset the unit by disconnecting electricity, waiting 20 seconds, and then reconnecting electricity to the heater.

Posted on Aug 01, 2010

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