Question about Rheem Tankless Hot Water Heater Rtg-74pvp-2 7.4 Gpm

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Code 11 - Rheem Tankless Hot Water Heater Rtg-74pvp-2 7.4 Gpm

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Before calling service technician, open following links for Rheem troubleshooting resources including error codes.
Error codes are considered start-point for troubleshooting.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/pdf/ErrorcodeTroubleshooting.pdf

Error 11 is no ignition.
This problem can probably be solved by routine yearly maintenance shown in instruction manual which recommends: Yearly cleaning, adjustment and inspection of burner and combustion parts.
The yearly maintenance would check incoming gas supply, venting, wiring and grounding, and burner and ignition parts.
All gas water heaters today require same maintenance: tankless require yearly, and tank-type require periodic (1-3 years)

Posted on Jul 04, 2011

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Posted on Jan 02, 2017

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I am getting an error code 11. When it trys to turn on I get a big pressure drop to about 1 or 2wc then a big jump to 20wc.


1) Probably bad PC board. Copy following link for code 11 troubleshoot.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

2) Call Rheem, call service technician

3) Don't install tankless water heater.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Dec 22, 2012 | Rheem RTG-95XN Tankless Outdoor Natural...

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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...

3 Answers

I have an error code of c2 11 on rheem model number ptg-74pvn-2 I will get warm water for about 5 seconds and then it goes cold


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 -Lou

Dec 10, 2010 | Rheem Tankless Hot Water Heater...

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...

1 Answer

Rheem take less hot water shuts down while in shower. Error code 11. Tried using more gas turned on gas dryer. This worked for 2 minutes, then error code 11. So I got a 2 minute army shower.


this is usally a ignition problem...it is usally the flame sensor or ignitor giving problem..if the unit is still under warranty contact rheem...or have a qualified technician check it out..

Aug 11, 2010 | Rheem Tankless Hot Water Heater...

1 Answer

Get a code 11 on start-up


that is a no ignition code need to have a qualified technician check it out

Jul 18, 2010 | Rheem EcoSense by 7.4 GPM Outdoor...

1 Answer

No hot water


The code # 11 is a code that warns of "no ignition" and the causes of this error code are too many to list. I would suggest that a qualified tech. perform a diagnostic test and repair.

This is not a task for the "do it yourselfer"

Mar 22, 2009 | Rinnai Digital Remote Water Heater Control...

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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