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.

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.

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

Remove the bird's nest in the flue. The 10, 59, 90 and 99 error codes indicate that a Noritz heater has experienced a combustion abnormality. In most cases, it is the result of an obstruction in the heater's flue. Examine the flue to see if it is blocked by debris and clean if necessary.

How To Resolve The Seven Most Common Noritz Tankless ...

Noritz https://www.noritz.com > Blog Nov 16, 2015 - This error code involves a breakdown in communication between two tankless water heaters using the Quick Connect Cord. It can occur when more ...

Troubleshooting Noritz Tankless Water Heaters and Error Codes

home-water-heater.com https://www.home-water-heater.com > noritz-error-co... Error code 90 and 99 ... Action: Check for the obstructed venting, improper gas burning (flame shape and color change). Ensure the water heater gets the ...

Error Codes for a Noritz Water Heater - Waterheatertimer.org

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I have a error99 on my tankless how do l reset it?

For a Noritz tankless water heater, error number 78 indicates a problem with the fan motor. The instructions below will help you clear the problem number 78 on a Noritz tankless water heater:

1. Turn off the power to the tankless water heater by either disconnecting it or switching off the circuit breaker.
2. Verify that the fan motor is clear of any obstructions or debris that may be preventing it from operating properly.
3. Check the fan motor is receiving power by measuring the voltage across the fan leads with a voltmeter. Verify that the electrical connections to the fan motor are secure if there is no voltage.
4. If the fan motor is broken or not operating properly, it may need to be replaced. For further assistance with the repair or replacement of the fan motor, you can contact Noritz technical support or a certified HVAC specialist.
5. After resolving the issue with the fan motor, switch off the power to the tankless water heater for at least 30 seconds before turning it back on. This will clear the error code and restore normal operation to the device.
6. If you are unclear or uncomfortable with any of these processes, you should seek the aid of a certified HVAC specialist or Noritz technical support.

Error Code 20 on a Noritz tankless water heater (model EZ98DV) is typically associated with an issue with the "priority" function, which is a feature that allows the water heater to prioritize certain uses of hot water over others. When the "priority" light is flashing and error code 20 is displayed, it typically means that there is a problem with the priority function and it needs to be reset. To fix this issue, you can try the following steps:

1. Turn off the power to the water heater by turning off the circuit breaker or removing the fuse.
2. Wait for about 10 seconds and then turn the power back on.
3. Press and hold the "priority" button for about 5 seconds, until the "priority" light turns off.
4. Turn the water heater back on and check to see if the error code has cleared and the "priority" light is no longer flashing.

If the error code 20 still appears and the priority light is flashing, it's best to consult the manual or a professional technician to diagnose the problem. It's important to note that the error code 20 can also be caused by other issues such as, faulty thermistor, faulty thermistor harness, faulty PCB, etc. So, it's best to get it checked by a professional.

Replace the circuit board, or call a technician to do it. No one repairs field replaceable subassemblies any more.

I am having the same error code. Did you ever get an answer?

ask Noeitz

this is a water temperature problem what controls your water temp is not working

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. https://www.noritz.com/home-owners/find-a-servicer/

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.

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.

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

https://support.noritz.com/download.php?file=Literature%20Page/Owners%20Guide/NRCP%20OG.pdf&field=OwnersGuide https://support.noritz.com/download.php?file=Literature%20Page/Owners%20Guide/NRCP%20OG.pdf&field=OwnersGuide Phone number to contact Moritz is on last page of manual.

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