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Error code 12 - Rheem Tankless Water Heater Main Remote Control

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Copy following link for Rheem tankless troubleshoot resources, including error codes, manuals, and general information for maintaining your tankless computer that heats water.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
Multiple error codes can indicate failed PC board. Rheem will send PC board... so your computer-that-heats-water might have failed motherboard.
Continual maintenance can help avoid common error codes, but some problems are insoluble and chronic.

Jul 16, 2013 | Rheem RTG-74PVN-2 Natural Gas Pronto Whole...

1 Answer

Jacuzzi tankless water heater code 12 appears


For my Jacuzzi tankless water heater model #J-SN180F: It turned out to be an exhaust issue. If I take off the exhaust vent completely then the talks heater works with 3 baths at full hot water. I get the error code 12 again as soon as I put event an elbow of the vent. So my conclusion is I need some sort of straight vent.

Apr 22, 2013 | Water Heaters

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Paloma Ptg-74......lp gas......this thing has been such a piece of junk.....replaced all LP regulators due to 12 error code....pressure is perfect and the regulators have over 1000000 BTU capacity....and...


I appreciate the frustration, and cannot offer a repair.
Tankless are high-tech gadgets that seem simple in principle, but are very complex machines.
I do not recommend tankless installation.

Open following link for troubleshooting resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
Error codes are considered start-point for troubleshooting.
Error code 12 is Flame failure.
Try cleaning the combustion parts, and replacing flame rod?
Problem can be air in gas line, failure of sensors, bad flame rod, improper grounding, voltage drops on circuit (bad circuit breaker), wiring on PC board, PC board failure, condensation collar, improper venting OR combination of many factors.

Frankly, once you replace the motherboard on a computer, generally people figure the computer is not going to last. The same is true for tankless PC Board.

Solve most tankless problems yourself, same day, for about $350.
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Aug 20, 2011 | Water Heaters

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...

1 Answer

Every time it rains our instantanious hot water system comes up with error C9 and C12


Before calling service technician, open following link for Rheem troubleshooting resources including contact and chat and typical manuals:
http://waterheatertimer.org/pdf/ErrorcodeTroubleshooting.pdf
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error codes are start points for troubleshooting and can include long list of things including multiple causes.
Error code 12 shows 'condensation collar' and 'vent lengths' which are associated with the vent to outdoors. Changes in air pressure during low-pressure rain events MIGHT affect the venting and cause tankless not to ignite, and MIGHT cause excessive condensation. Improper condensation can rust out the heat exchanger without showing any signs of problem until the unit is ruined.
C9 is not listed. Contact Rheem, and then add a comment saying what Rheem suggests as solution for C9 error. This will help others in the community with same-similar problem.

Instruction manual recommends yearly maintenance by qualified service technician.
This maintenance would usually check all things shown in error 12.

Jul 18, 2011 | Rheem Tankless Hot Water Heater...

2 Answers

PALOMA PTG-74PVN-1 Code C8 12 my water heater


C8 is the last stop in the point of burner ignition and a total of eight error codes. Error code 12 is a supplemental code that means your LP gas supply is too low...have your LP tank service and try again.

HTH,

Mike...

Dec 06, 2009 | Rheem Paloma Tankless Water Heaters...

1 Answer

The number 12 shows and there is no hot water


The error 12 means flame loss. It is most commonly caused by insufficient gas pressure supplied to the unit, but it can also be caused by debris on the flame rod. Blockage in the exhaust vent or a stuck flue damper can also cause a 12 error code

Nov 09, 2009 | Noritz 6.9 Gallon Residential Direct Vent...

1 Answer

This things beeping and flashing 12 everytime we


check the error codes on it by pressing the on off button for 2 seconds then while holding the on/off button press the up button this should display the last 9 error codes let me know what they are

Jul 28, 2009 | Rinnai Water Heaters

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