20 Most Recent Noritz Commerical Tankless Water Heater N-132M-ASME-NG Questions & Answers

I recently had a similar problem with my N-132M-ASME heater. The unit would come on, then shut down and flash Error Code 21. According to the owners manual, that code indicates the unit is not getting enough air. I tried vacuuming the unit, blowing it our with air and checking to be sure the exhaust lines were clear. Nothing helped. A service technician came out and recommended I descale the unit and clean the burner. I did this but the problem did not go away. He also suggested I replace the Burner Sensor. It's not an expensive part, around $20. I ordered the part and have not had a problem since I installed it. Hope this helps.

Noritz... | Answered on Mar 04, 2015

The Noritz Manual shows fixed for the following error codes:
For all other codes this is the recommendation:
Contact our sales agent if:
• Any other error code appears.

Noritz... | Answered on Sep 12, 2014

there are several small filters in the inlet sides of the tankless heaters, you might start there..

Noritz... | Answered on Jan 27, 2011

Electronics are very sensitive to temp, so I agree with the tech.

Noritz Water... | Answered on Oct 31, 2019

I searched for that error number 903 using https://www.google.com and saw several fraudulent sites, so beware.

There is a similar error number 90 mentioned several places, but that error requires a technician to repair it as it may be dangerous to do it yourself.

Noritz in the United States has a search feature to find a technician if you need one.


Noritz Water... | Answered on Aug 29, 2019

Code 11 is ignition failure.
Ensure that your gas is turned on.
Start by checking the vent system to ensure there is no obstruction or separation in the vent system.
Second I would recommend flushing the water heater with vinegar or Rectorseal Calci-Free. Calcium and scale build up in tankless water heaters can cause several failures that are not directly related to the specific code displayed on the heater.
If the problem persist I would look for a plumber that is familiar with tankless water heaters.

Noritz Water... | Answered on Mar 02, 2019

You should try to describe the noise and what is happening when the noise occurs. Then someone may be able to give you some diagnosis of the problem. For example, does it make a big boom sound went it lights the burners? Then you might need to clean and adjust the pilot light.

Noritz Water... | Answered on Dec 25, 2018

Here is a link to all the Noritz error codes. There is NO Code 67. https://inspectapedia.com/heat/Noritz-NCC199-Error-Codes.pdf

Noritz Water... | Answered on Nov 21, 2018

I need the full model number of the water heater to pull the manual on it for you.... so far only an error code 61 is shown. sometimes a 6 can look like a 5 on a digital display if it's a 6 then error code 61 is bad fan motor or printed circuit board that sends power to the fan motor.Get me the full model number, we can go from there

Noritz Water... | Answered on Nov 13, 2018

Not finding what you are looking for?
Noritz Commerical Tankless Water Heater N-132M-ASME-NG Logo

4 questions posted

Ask a Question

Usually answered in minutes!

Top Noritz Water Heaters Experts

Fahr Quad

Level 3 Expert

774 Answers


Level 3 Expert

85239 Answers

Paul Carew

Level 3 Expert

3522 Answers

Are you a Noritz Water Heater Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

Noritz Water Heaters

  • Noritz Water Heaters

Most Popular Question

working n1321 asme unit

  • Water Heaters