Question about Noritz NH150-DV-NG Indoor Direct Vent Natural Gas Tankless Hydronic Boiler NH-1501-DV

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Noritz Boiler NH-1501-DV-NG Shuts off at radom times with blinking error code 123

Noritz Boiler NH-1501-DV-NG Shuts off at random times with blinking error code 123. Manual description is not very useful. Flam is good and gas pressure if ok as well.

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Error code 123 is a flame rod sensor problem. Chances are the flame rod is sending a weak signal to the control unit. Check for a loose flame rod electrical connector. Peek in the flame inspection windows to ensure there is a proper flame on that side of the burner. If non of the above then try removing the flame rod and cleaning with 400 grit sandpaper or replace it with part order # SKC7448 (called an Ignition plug ELV & Packing EHK SETV)

Posted on Jan 31, 2015

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Posted on Jan 02, 2017

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SOURCE: Noritz Tankless error code 16

The trick with these hot water heaters is to keep the filter screen clean and flush the system with CLR periodically. Code 11 is ignition error. Is your gas valve turned on?

Posted on Dec 09, 2009

senor8

Chris Sellers

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SOURCE: noritz f 76 error blinking f 76 and on off

F76 is a communication error between two quick connected heaters. To clear the code, disconnect power from both heaters, wait 20 seconds, then reconnect power.

Posted on Jul 15, 2010

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This is a sophisticated appliance unserviceable to Consumer but you may diagnose it with the help of the FE for Service Contractor to repair.
N069M-DV was discontinued 3 years ago replaced by N0751M-DV. Have you checked the inlet filter since you bought it? Is it on good soft water? It's a strong pretty dependable unit IF INSTALLED PROPERLY and MAINTAINED.

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