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

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Will run for 3 min and shut down error code C5 and 12 or C7 and 12

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Hi my names pete ill try and help c7 is where the start up sequence has ended c12 is saying gas service has been interupted hope this helps

Posted on Nov 18, 2009

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I have a Ecosense.... My tankless hot water is not working it turn off when i use it for 2 to 3 min


Most likely the heat exchanger has build up in it, the unit will need to be flushed with descaler. But refer to the owners manual or behind the cover of the unit to confirm the error code. Good luck.

Nov 05, 2013 | Water Heaters

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Default code C7 76


Hello Howard

1) Copy following link for troubleshoot resources including error codes:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

2) Unknown if this is new install or older unit with new problem
This error code can be failed PC board

3) Feb 2013. Add a comment and say what you find

Feb 01, 2013 | Rheem Water Heaters

1 Answer

Code c7 13 is displayed on control panel. When I reset it it runs for a few minutes then quits again


Open following link for Rheem troubleshooting resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

C7 is communication with remote control, but can also be related to other problems.
For possible C7 quick fix:
http://waterheatertimer.org/pdf/Error-code-C7.pdf

Apr 21, 2011 | Rheem Paloma PTG-74PVN / RTG-74PVN...

1 Answer

HEATER SHUTS DOWN AND I GET A READIN FO C7 76 WHATS THE PROBLEM?


Open following link for handy Rheem troubleshooting resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf

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Mar 25, 2011 | Rheem Tankless Hot Water Heater...

1 Answer

Rheem tankless propane hot water heater error code C7. Cant get hot water. It keeps shutting off and then once turned back on wont work and gives the C7 code. What does it mean?


Use following link for Rheem tankless troubleshoot: http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

I believe error code C7 is same as error code 76

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Feb 17, 2011 | Rheem Tankless Hot Water Heater...

1 Answer

Paloma (Rheem) tankless water heater 7.4 gpm 199,000 btu outdoor unit. Red light is blinking on pc board. unit fires up for approx 2 seconds then shuts off, then cycles once more for 2 seconds and shuts...


i think your flame sensor is bad but you will need to confirm that with rheem i am unsure what the c7 is for but code 12 is flame failure and there could be carbon build up on the flame rod...

Aug 06, 2010 | Rheem Tankless Hot Water Heater...

2 Answers

Rheem Tankless wh model rtg-74pvn shuts off error code c4 76


Contact Rheem; the Burner control unit has lost comm with the remote...the part is warranteed for up to five years.

Nov 01, 2009 | Rheem RTG-74PVN-2 Natural Gas Pronto Whole...

2 Answers

Have a rheem rtg74pvp1 propane fires and runs for 6-7 min shuts down error code c7 then 13... will restart if cleared and started again


Basically this error means the input gas is restricted...line is too small. If the unit was working properly prior to this error code, you'll have to take the burner control assembly apart and perform some detailed...spring cleaning.

I have the procedure in PDF format...but unfortunately I don't have it with me at this time. Easiest thing at this point would be to call Rheem/Paloma Customer Support at (800-432-8373); advise them of the error code and they will send you the procedure in an easy to follow, step-by-step format. It's a fairly easy proccess, but takes about 3 hours to complete.

Thanks for trying Fixya.com

Mike...

Oct 26, 2009 | Rheem Paloma PTG-74PVN / RTG-74PVN...

11 Answers

Paloma tankless, gas, water heater, error code C7 76


If you look on the left hand side of the burner control module you'll see 4 capacitors - the capacitors have most likely failed...pretty sure anything code 76 is P/S failure. It may also be covered for manufactures defects. If the cap is blown..the top will be slightly raised as apposed to flat like the other nearby caps - they are called top blow capacitors...the damage should be evident.

Jul 24, 2009 | Rheem Paloma PTG-74PVN / RTG-74PVN...

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