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Error code -11 what doesthat mean? - Water Heaters

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Owner's manual, troubleshooting section. No manual, try MFG website, or their customer service email, or manualslib.com

Posted on Apr 08, 2015

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Posted on Jan 02, 2017

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I am getting a C2 11 problem error on my Rheem tankless water heater, What that mean?


Just how much did you investigate this on the internet before asking here? I Googled " Rheem C2 tankless water heater" and found http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html. Look under Error Codes. Code 11 refer to gas supply/ignition. If you don't know much about tankles water heaters or gas ignition, call a Rheem Tech.

Dec 13, 2014 | Rheem Water Heaters

1 Answer

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

My water heater shows error code c-4 it starts for 3-4 min then stops. what does this code mean?


Before calling service technician, open following link for Rheem error codes, chat, and possible solution:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error codes are start-point for troubleshooting.
C4 11 can mean no ignition:
Simple solution for this problem can be to clean burner and combustion parts including sanding any carbon deposits off of iginiter.
Other simple things can be loose wiring on gas solenoid, or improper grounding, or low gas flow or gas pressure.
Other causes can be bad gas solenoid, bad igniter, misaligned ignition parts and sensor, bad igniter wiring.

As you know from reading your product manual, tankless require yearly service. This service can prevent many common error codes before they happen.
Typical do-it-yourself maintenance can be accomplished using following pdf
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf

Sep 16, 2011 | Rheem Paloma PTG-74PVN / RTG-74PVN...

2 Answers

I am getting a C2 11 code on my eco sense tankless water heater. There is also a flashing 24, any ideas? Thanks


Multiple error codes can mean PC board failure.
C2 11 is no ignition.
Error 24 is malfunction of operational switch: "press max or mim button on PC board, or replace PC board." On some models, max and mim button can be located just above dip switches, and rotates with screwdriver. See diagram in manual.

Before calling service technician, open following links for troubleshoot resources including error codes, Rheem chat, and possible manual.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/pdf/ErrorcodeTroubleshooting.pdf

Aug 10, 2011 | Rheem EcoSense by 7.4 GPM Tankless Water...

2 Answers

We are getting multiple codes. Can someone help us. Last year we got cod c2 11 which we found out we just have to clean the probes in the unit. So we did that yesterday again and everything worked great,...


Rheem, Richmond, Ruud, and Paloma are all the same manufacturer. After about 9 months, my tankless RTG-74PVN started giving me error code 11 and cold water!. I fixed it by cleaning the burner, as shown in this video:
www.howtolou.com/clean-a-burner

Jul 31, 2011 | Rheem EcoSense by 7.4 GPM Tankless Water...

2 Answers

Replaced mother board due to error code c2 11 as per rheem tech department. now code 11 flashes after 3 to 4 minutes of use and unit shuts off. WHAT NOW????


Rheem, Richmond, Ruud, and Paloma are all the same manufacturer. After about 9 months, my tankless RTG-74PVN started giving me error code 11 and cold water!. I fixed it by cleaning the burner, as shown in this video:
www.howtolou.com/clean-a-burner

Dec 29, 2010 | Rheem Paloma PTG-74PVN / RTG-74PVN...

1 Answer

What does error code C2 11 mean?


code 11 means there is not enough gas

is this a new install?
do you have at least 3/4" gas line to the unit?

Aug 28, 2010 | Rheem Paloma PTG-74PVN / RTG-74PVN...

2 Answers

I keep getting a C2 11 error code. Unit lights and immediatly goes out showing that error. At other times it operates fine. The problem seems to be occurring more frequently. It has been in service...


that error code means not enough gas.
however, there might be something going on with your venting. it could be sucking exhaust air back into the unit. this will cause the same error code.
if your problem is intermittent, then I would suspect the venting to be the issue.

Aug 22, 2010 | Rheem Paloma Tankless Water Heaters...

2 Answers

Problem for Rheem Paloma PTG-74PVN / RTG-74PVN Natural Gas Indoor... What does C2 11 error code mean on my Paloma


hi pete here ill try and help this could be 2 things check the sensor on the unit the outher one is a qustion has the gas company changed your meter latley and turned off you gas and not come back to light your poilet because this code also means not enough gas or wrong type of gas

Nov 18, 2009 | Rheem Paloma PTG-74PVN / RTG-74PVN...

2 Answers

Noritz 0631x water heater


I guess this a gas heater.You need to look at the manual to find out what code 11 is.It could be misfired or tempture to high.Give me a litte more infor.thanks

Mar 06, 2009 | Water Heaters

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