Question about Noritz 6.9 Gallon Residential Direct Vent Tankless Water Heater - N

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Noritz tankless water heater not producing hot water

I have had a Noritz N-069m tankless water heater for the last 3 years. When I turned on my hot water today, I noticed that it was just trickling out of the faucet. I checked the hot water heater and it is blinking error code 16. Any idea what this error code indicates? Their customer service is not open and I would rather not wait a day or two to find out what the issue is.

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  • ross_fairy20 Jan 11, 2009

    my tankless hot water heater is not workin i need help today

  • Les922 Feb 17, 2009

    exactly the same.  the water tricles then code 16 comes on.  what can I do to stop this?

  • Lochsa May 02, 2009

    I hear ya! Have the same problem and cannot find what error code 16 is.

    frustrating!

  • Anonymous Mar 26, 2014

    can you use a noritz tankless water heater vent kit for a kenmore water heater; same size vent?

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I called Noritz error code 16 is a overheat problem. Noritz say's to flush your coil with vinegar or CLR.
Use a small pump to recirculate the CLR or vinegar through the system for 45 minutes and flush with fresh water. This worked for me.

Posted on May 12, 2009

  • Kimberley
    Kimberley Apr 24, 2014

    I did this and it worked for a week and it shut off again today with error code 16. how do you adjust the manifold pressure?

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Likely pilot is out; I hope it is repaired by now.

Posted on Jan 06, 2009

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