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

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No hot water out of a rtg-74pvp-1 tankless water heater

When I turn on the water I get no hot water and the remote flashes c5 and c7 followed by flashing 12. I cleaned the filter, turned the remote off and back on again and I had hot water. What's going on with the water heater?

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  • Anonymous Jan 31, 2009

    My water heater shuts down and flashes C7 - 12 and i have to keep reseting thermostat. How do i fix this problem?

  • Anonymous Feb 05, 2009

    the same thing happens to my water heater ? do i ned to take it back and get a new one.

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In order to reset the unit you will have to turn the temp all the way down then unplug the unit for 5 min,, remember it is a computer and it knows, after plugging in back in after the five min, reset the temp open up a fauset while doing this, that way it will be regestering the flow of water to set the temp by

Posted on Jun 29, 2009

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1 Answer

Code c7 13


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

Feb 01, 2013 | Rheem Tankless Hot Water Heater...

1 Answer

C4 76 error code on richland waterheater


Richland tankless is made by Rheem.
C7-76 is communication fault with remote.
Turn off power at remote and wait 5 minutes, turn power back on at remote, and see if problem clears.
If problem continues, read below:

Before calling service technician, open following links for troubleshoot resources including error codes, Rheem chat, typical maintenance manual:
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Tankless water heater, more than any other type of heater, need to be maintained.
Maintaining tankless will probably not affect C7 76 fault code, but can prevent many other common error codes.
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf

Sep 14, 2011 | Rheem Tankless Hot Water Heater...

1 Answer

Thermostat model UMC 117 keeps coding C7 why?


Generally, C7 is communication problem with remote
Error codes are considered start point for troubleshoot.
Causes can be: Bad remote, bad wire to remote, loose wire connection at remote, loose wire connection at unit, bad PC board.
In no particular order:
Check wire connections.
Disconnect remote and let water heater control temperature at default 120 degrees F, and if no further problem develops, then that might eliminate PC board as source of problem.
Replace wire to remote.
Replace remote.
Call service technician to diagnose problem.
Contact Rheem about PC board and other options.

Before calling service technician, open following links for troubleshooting resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf

Aug 14, 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

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

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

1 Answer

My tankless is shuting off or flashing C4 and/or C7


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
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Feb 09, 2011 | Rheem Tankless Hot Water Heater...

1 Answer

My hot water heater keeps kicking off and the theramsatic is flashing C7 76. How do I reset it?


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

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Jan 31, 2011 | Rheem Tankless Hot Water Heater...

1 Answer

Can't find manual & have a C7 error code on a Rheem tankless water heater model # rtg-74pvm-1.


need to contact rheem what you can do until then is remove the control wire it will run until parts ship out

Jul 26, 2010 | Rheem Tankless Hot Water Heater...

1 Answer

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


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

Nov 18, 2009 | Rheem Tankless Hot Water Heater...

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