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Noritz N063SOD tankless water heater has low water flow. Tried cleaning the little filter and back flushing/front flushing to no avail. Is there another filter or a check valve that may be clogged? I am a tech, so I can dig into it ;)

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  • humboldtfore
    humboldtfore Jan 13, 2013

    I fixed it. Just tried unplugging it, waiting for 5 minutes and then turned it back on. It was obviously an electric valve. Now I have a very clean unit and a new semi-frustrating experience :)

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6 Suggested Answers

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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: Noritz tankless water heater not producing hot water

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

senor8
  • 73 Answers

SOURCE: Water Heater Won't Fire up

There are a few things you'll want to check:
1) make sure you have 120VAC at the outlet
2) measure voltage across the blue/white and black/white wires connected to the gfi (black box inside the unit on the bottom left or right hand side). You should read roughly 100 VAC on both sides. If you don't read voltage on the black/white wire pair, then you gfi is tripped. Look for moisture that might be shorting the gfi.
3) If the GFI checks out ok, you probably have debris clogging your flow sensor

Posted on Aug 15, 2009

  • 1 Answer

SOURCE: noritz tankless water heater gives error code 11

This worked for me in the same situation. There is a filter inserted into main gas/ water control valve that senses water flow restriction. The sensor is connected to the gas valve. If it senses inadequate water flow it tells the gas valve to shut down so the water in the heater won't boil. Very expensive part. If you do find the filter clogged, a sediment water filter shoud be install on the inlet side of the water piping.

Posted on Oct 13, 2009

  • 2 Answers

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
  • 73 Answers

SOURCE: error code 14 shows on the remote for a noritz

This means the thermal fuse has broken and needs replacement. The thermal fuse is a white cord which wraps around the heat exchanger. It typically breaks if the unit is excessively dirty and sooted. Before the fuse is replaced you should make sure the unit is cleaned with compressed air and descaled.

Posted on Jul 15, 2010

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