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

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My Noritz N-084M has an error code. the red light on the front flashes 4 times

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Check the remote control for the actual error code, but here are some of the more common codes associated with 4 flashes:

20 - high limit switch; typically caused by scale in heat exchanger: I recommend performing a descale

66 - water flow control valve abnormality; typcially caused by scale in the valve, again I recommend a descale

61 - fan motor abnormality; usually the fan won't run properly and requires replacement; however, it can also be caused by a low or inconsistent voltage supply

Posted on Jul 15, 2010

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Tank will not turn on when sink hot water is turned on


Do other faucets in the house work ok? if so the kitchen faucet may not be creating enough water flow to trigger the noritz. The Noritz have a flow meter inside of them (depending on the year they where made, older units require 3/4 GPM, newer models require 1/2 GPM). If the kitchen faucet is not turning on the hot water, you can check the angle stop and make sure it is open all the way. Also check the aerator on the faucet to make sure it is not plugged and restricting the flow.

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014 code


A 14 code means the thermal fuse (white wire which wraps around the heat exchanger) has snapped. This occurs if the heat exchanger reaches a dangerously high temperature. To correct this error code you need to replace the thermal fuse and keep the heat exchanger from over heating. Typical reasons the heat exchanger over heats are:

1) scaling in the heat exchanger
2) combustion chamber dirty and burning hot

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I have a red blinking light with code 90 displayed. We were getting hot water this morning and all of a sudden it is just cold now. Wondering how we go about getting it fixed. Thanks.


the 90 code indicates poor combustion. It can typically be resolved by cleaning the unit with compressed air, performing a descale, or corrected an improperly sized gas line.

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What does a F12 error indicate on a Noritz system


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)
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Got a noritz elvkoo3 heater shuts off and i get a code 90


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1 Answer

Light blinking 3 times - no remote - won't come on


You have an error code. If you cut electricity to the unit and wait about 20 seconds before powering it back up, the unit will come back on again. There are serveral error codes associated with 3 blinks, I'd recommend instaling the remote controll to determine exactly which one it is (instructions are in the installation manual).

The most common error code associated with 3 blinks is a 16 code, which is typically related to scale formation in the heat exchanger. This error code can be fixed by performing a descale.

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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...

1 Answer

Need to know what 4 blinks on the red light means


If the unit runs for a while before coding out, it's probably a "high limit error" (20 code). This code can be resolved by performing a de-scale on the unit: http://noritz.com/u/Descale%20Procedure.pdf

If the unit immediately goes into the code after reset, it's probably a "fan motor abnormality" (61 code). This code is either caused by inadequate voltage to the unit (less than 120VAC), or by a damaged fan motor.

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