20 Most Recent Noritz 7.1 Gpm Propane Lp Gas Tankless Hot Water Heater Questions & Answers

I don't think clean until you remove it.the clean it well and fine waterless lub.for it

Noritz 7.1 Gpm... | Answered on Nov 01, 2013

73 code is a circuit board error. It typically occurs if you connect or disconnect anything in the heater with power on. Try disconnecting electricity for 20 seconds to reset the unit. If the problem continues, you may need to replace your circuit board.

Noritz 7.1 Gpm... | Answered on Apr 29, 2011

Go over to unit and with somebody else turning on the water listen for the ignition to kick in it will make a tick, tick sound if you dont hear the tick, tick sound you have a faulty igniter. Hope this gets you in the right direction.

Noritz 7.1 Gpm... | Answered on Jan 27, 2011

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.

Noritz 7.1 Gpm... | Answered on Oct 31, 2010

The 59 code is typically caused by insufficient gas supply to the unit. It can also be caused by obstructed exhaust flow, stuck exhaust damper (located directly on top of the unit's exhaust), insufficient makeup air, or improperly installed venting (i.e. too long or too many elbows).

I would recommend initially checking the incoming gas pressure at the gas connection on the unit. The gas pressure should not drop below 5" water column for a natural gas unit, 8" for a propane system (the unit need to be operating at its maximum output).

Noritz 7.1 Gpm... | Answered on Aug 14, 2009


Noritz Water... | Answered 1 hour ago

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

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