Question about Navien NP-240-NG Tankless Condensing Gas Water Heater 98% - 199,000 BTU

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Navien NPE240a ng, error code E515 - Navien NP-240-NG Tankless Condensing Gas Water Heater 98% - 199,000 BTU

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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...

1 Answer

Error code tankless gas


E2 is a cold water inlet temp sensor. Has your unit experienced any freezing conditions? If it senses below 36 degrees or above 90 degrees it will show this error.

If its normal temp, and you still get this error...check your sensor. Its an 8(kohm) sensor. Make sure its not open. If it reads ok and your temp is not an issue, then you probably have a bad control board

Dec 15, 2013 | Bosch AquaStar 2400ES-NG

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

E9 error code


Before calling service technician, copy following links for troubleshoot resources:
http://waterheatertimer.org/pdf/Bosch_E9_troubleshooting.pdf
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html
You should delime water heater once per year to prevent many common error codes.
http://waterheatertimer.org/pdf/Delime-tankless-water-heater.pdf

Aug 23, 2012 | Bosch AquaStar 2400ES-NG

1 Answer

E7 code what to do ?


Before calling service technician, call Bosch. 800-642-3111
E7 is not shown as common error code.
Error codes are considered start-point for troubleshooting.

Open following links for general Bosch troubleshoot resources:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html
Common error codes:
http://www.boschhotwater.com/HelpfulResources/TechnicalSupport/BoschAquaStarModels/2400ESTechSupport/Troubleshooting/tabid/1295/Default.aspx
Service bulletins for reading how to fix tankless yourself:
http://www.boschhotwater.com/HelpfulResources/TechnicalSupport/BoschAquaStarModels/2400ESTechSupport/ServiceBulletins/tabid/1300/Default.aspx

Aug 27, 2011 | Bosch AquaStar 2400ES-NG

1 Answer

Error code E9


High pitched noise is from a very high CO2 level. Adjust the gas pressure to stay above 11" w.c. and have a gas technician with a calibrated CO2 analyzer adjust the CO2 levels.

Apr 21, 2010 | Bosch AquaStar 2400ES-NG

1 Answer

Error Code EA - not in owner's manual


Think maybe just loose connect to me.

Mar 13, 2009 | Bosch AquaStar 2400ES-NG

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