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

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My water heater doesn't have hot water for very long. It has error code c4 followed by 13. Any help I would appreciate.

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13 code means you dont have enough combustable air in the room to run it try opening doors and turning a fan on and blowing it toward the unit and see if it works better, if it does you know you need to drill some holes in some walls to get some more combustion air into the room for it rule of thumb is 1 square inch per 1000 btu needed

Posted on Aug 02, 2009

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C4 13


Could be bad thermocouple, or oxygen sensor, not enough fresh air to unit.
Probably bad PC board. Rheem will send new board and you can install yourself.

Bad PC board is kind of like the motherboard on your computer, so expect same level of performance after replacing motherboard ... which usually means the computer's days are numbered before another major problem.

Copy following links:
http://waterheatertimer.org/pdf/Fault-codes-11003.pdf
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/pdf/Error-code-13.pdf

Sep 20, 2012 | Water Heaters

1 Answer

C4 13 code


Before calling service technician, open following link for Rheem tankless troubleshooting resources including error codes and typical maintenance:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Apr 21, 2012 | Rheem Tankless Hot Water Heater...

1 Answer

Help with error code


Before calling service technician, open following link for Rheem tankless troubleshooting resources including error codes and typical maintenance:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Mar 20, 2012 | Rheem Tankless Hot Water Heater...

1 Answer

I have a poloma model/ pt62-42pvn its flashing error code c4 76 i have had no hot water for six days now need help


1) Before calling service technician who can test parts, open following link for Rheem resources including error codes, Rheem chat and phone number, possible manual:
If local technician cannot solve problem, Rheem can probably recommend a person.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

2) Error codes are start-point for troubleshooting.

3) Multiple error codes can indicate PC board failure.
If your computer motherboard fails, most people feel the computer is compromised even after motherboard replacement.

4) Error code C7-76 is communication error with remote, and can include bad remote, bad wire to remote, loose wire, or bad PC board.
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf

5) Error C4-13 can include part failure, vent problem, oxygen depletion, and can also include PC board failure.
http://waterheatertimer.org/pdf/Error-code-13.pdf

6) Tankless routine maintenance manual:
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf

7) Some posts about tankless concede that qualified technician was unable to repair unit.
Solve most tankless problems yourself, same day, for about $350.
http://waterheatertimer.org/How-to-install-gas-water-heater.html

8) Take a moment and rate answer:
And 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.

Sep 08, 2011 | Rheem Paloma Tankless Water Heaters...

1 Answer

No hot water error codes 76, C4,C7


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

Error codes are considered start-point for troubleshooting.
Multiple error codes can mean PC board failure.
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf
http://waterheatertimer.org/pdf/Error-code-13.pdf
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf

Aug 12, 2011 | Rheem RTG-66DVN Direct Vent Natural Gas

1 Answer

Code c4-13


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

Error codes are considered start-point for troubleshooting.
Error code C4 13 is bad oxygen sensor, inadequate incoming air supply, or bad venting. Also bad PC board, or internal wiring, or temperature set too high, damaged burner parts.
http://waterheatertimer.org/pdf/Error-code-13.pdf
http://waterheatertimer.org/pdf/Bosch_Ventilating_tight_houses.pdf

Tankless require yearly maintenance to combustion chamber and burner parts.
Prescribed maintenance can correct some of the issues in error code 13.

Jun 25, 2011 | Rheem EcoSense by 4.2 GPM Tankless Water...

1 Answer

I have a paloma tankless water heater, ptg-42pvn. It was flashing, C4, 13 and now it only flashes -0, 13 and will not even turn on. Tried to reset it by unplugging it and it only flashes -0, 13 even...


Multiple error codes can mean different things, including bad PC board.
C2 13 might be the oxygen sensor. -0 and no operation indicates bad board, but other things might be notched into same problem like loose connections.
Error codes are starting point for troubleshooting.
Before calling service technician, open following link for Rheem-Paloma troubleshoot resources including Rheem chat.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Upvote the help.
And 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.

May 28, 2011 | Rheem Paloma PTG-42PVN / RTG2-42PVN...

1 Answer

Rheem gas tankless water heater with error code c4 13


problem is inside burner compartment o2 sensor dirty or block..need to have a qualify technician clean it.

May 16, 2010 | Rheem Tankless Hot Water Heater...

1 Answer

Rheem tankless water heater error code C4 13??


check diaphrapm valve or micro/switch best of luck

Sep 13, 2009 | Rheem RTG-53PVN Indoor Natural Gas...

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