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Code Noritz 51

Why is it displaying error code 51?

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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

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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...

2 Answers

What is code blinking 20 on noritz tankless hotwater heater N_069M


The error is a HIGH LIMIT THERMAL ERROR. That means Calcium buildup has appeared in the unit. It is also called scale. To clear the error you have to power it off. That is done by the circuit breakers. You should descale the unit first though.

Jul 26, 2014 | Noritz Water Heaters

1 Answer

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


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)

Dec 16, 2012 | Noritz NH150-DV-NG Indoor Direct Vent...

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

What is error code 043 on NORITZ tankless heater?


There is no error 43 on a NR71. There is a 73 error code which is caused by disconnecting jumper cables while the power is on.

Oct 29, 2010 | Noritz 7.1 Gpm Propane Lp Gas Tankless Hot...

1 Answer

Getting error code 16. what does it mean and what


a 16 error code is typically caused by scale formation. I'd recommend performing a descale on the heater.

Mar 06, 2010 | Noritz 6.9 Gallon Residential Direct Vent...

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...

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 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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