Question about Noritz N-069M-DV, N-084M, and N-084M-DV Pipe Cover

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What does a F12 error indicate on a Noritz system

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F12 occurs on a multi-system or quick connect. It means one of the units on the system suffered a flame loss. More specifically, it means the flame rod stopped detecting flame on the burner. The most typical causes are as follows:

1) insufficient BTUS (low gas pressure)
2) leaking heat exchanger
3) clog in the manifold, burner, or heat exchanger
4) stuck flue damper or improperly sized venting
5) dirty flame rod
6) damaged circuit board or gas valve

Posted on Oct 19, 2010

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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:
11
21
90
99
For all other codes this is the recommendation:
Contact our sales agent if:
• Any other error code appears.

Sep 12, 2014 | Noritz Commerical Tankless Water Heater...

1 Answer

What does an error code 66 mean on a noritz Model N-0751M


http://www.noritz.com/u/pages_from_field_manual_2010_12_09_pdf__adobe_acrobat_professional.pdf



The Noritz field manual says that error code 66 is Bypass Water Control Valve failure. Call support at 866-766-7489 with your model #, serial # (both on the unit face plate), date of purchase, to see if the valve can be replaced under warranty.

Jul 14, 2012 | Water Heaters

1 Answer

The Noritz HW Heater has been tripping out some (usually whenever the shower is running, and someone turns on cold water). LED flashing three times. Any Ideas


This is probably a 16 error code. This code indicates the outlet water spiked above the set temperature for an extended period. It usually means the heater needs to be descaled or the manifold pressures need to be adjusted.

Mar 10, 2011 | Noritz 6.3 Gallon Residential Tankless...

1 Answer

I have a Nortitz natural gas water heater, model #N-063s-1. Acouple of days ago it stopped heating the water. what can I do myself to fix this matter. Thanks, lynnatheana@hotmail.com


There are many reasons a tankless heater will stop heating water. The first thing I would look for is a flashing red light on the burner indicator. The flash break down goes as follows

continuous blinking - typically means ignition failure or the unit is overheating; look for visible water inside the unit, have your gas pressure checked, or check the flame rod/igniter for buildup of debris

three blinks - typically indicates 16 error code; typically resolved by performing a descale

4 or 5 blinks - exotic error codes; for these you should definitely contact Noritz tech support

If there is no flashing light, first check your filter for debris. If the filter is clean, your flow sensor is probably stuck. Again I'd recommend contacting Noritz tech support to help you clean the flow sensor.

Jul 31, 2010 | Noritz 6.3 Gallon Residential Tankless...

1 Answer

My Noritz tankless will sometimes flash 5 red quick lights which indicates to me that it's not firing and I've only succeeded in restarting it at the circuit box. What servicing needs to happen to prevent...


You are getting an error code. A 5 flash error code is typically caused by voltage supply abnormalities. If you are using a generator, battery backup, or solar electricity inverter, make sure it is supplying your heater with a smooth sine wave AC voltage.

This code can also be caused by connecting jumpers inside the unit with power connected or buildup of soot on the sensors

Feb 24, 2010 | Noritz 6.3 Gallon Residential Tankless...

1 Answer

Sometimes the hot water just goes cold


Here are a couple things to look for:

1) flashing burner light - a flashing burner light indicates the unit is getting an error code
common error codes:
A. continuous flashing - ignition failure or abnormal combustion; look for visible water in the machine indicating a leak, check gas pressure, debris or buildup on flame rod/igniter plug, or clean unit with compressed air
B. 3 flashes - error 16, abnormal outlet water temperature; typically this code indicates you'll need to descale you unit
C. 4 or 5 flashes - exotic error codes; you should contact Noritz technical support to deal with these codes

2. If there is no flashing code, try increasing the hot water flow. In the summer time you typically use less hot water; this can result in intermittent operation of your tankless heater. Increase water flow by either: A. cleaning your showerhead and removing scale deposits B. widening your flow restrictor C. Remove your flow restrictor in the showerhead

3.If none of these resolves your problem, you probably have debris in your flow sensor. Contact Noritz technical support for a walkthrough on removing debris from a flow sensor.

Feb 18, 2010 | Noritz 6.3 Gallon Residential Tankless...

2 Answers

Panel is flashing a 20 code and water is ice cold. Unable to reset system from control panel.


I was just told by Noritz America that flashing 20 is hard water issues. Any confirmation on just what this error code means?

Nov 01, 2009 | Noritz 6.9 Gallon Residential Direct Vent...

1 Answer

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?

Oct 17, 2009 | Noritz 6.9 Gallon Residential Direct Vent...

2 Answers

Noritz 069 error 11


error code 11 is an ignition problem. make sure your gas pipe is sized properly, if your on propane check your tank and make sure it's not low or when it's running take the cover off and look in the flame window and make sure it's an even flame if not you probably have a gas control valve problem

Aug 06, 2009 | Noritz N-069M-DV, N-084M, and N-084M-DV...

2 Answers

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.

Jan 04, 2009 | Noritz 6.9 Gallon Residential Direct Vent...

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