Error code C 12 Richmond 42PVN - Rheem Tankless Hot Water Heater Rtg-74pvp-2 7.4 Gpm

The error code 13 indicates that the PTG2-42PVN is not getting enough air or the vent termination is blocked. Check both the intake and exhaust termination for blockages and remove any debris. Make sure that you have good air flow in the room (no other vents should be blocked). Clean any other blocked vents. If you use a fireplace or space heater in that area, open a window or vent to increase the oxygen levels in the room. If other appliances are used in the area, make sure that they aren't affecting the ventilation and oxygen levels in the area. If you bring in air to the water heater from the outside, make sure that other appliances aren't exhausted to that area.

ManualsLib has the manual for the PTG2-42PVN: https://www.manualslib.com/products/Rheem-Ptg2-42-Pvn-Pvp-330558.html . The error codes and solutions are listed on page 33: https://www.manualslib.com/manual/140606/Rheem-Ph-16-Fisn-Fisp.html?page=33#manual .

I hope this helps.

Cindy Wells

http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html#error

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

http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html#error
Error codes and troubleshoot on link above
Catch up on maintenance
Hire service technician

Gene

Water Heater Timers Save Money

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

Copy following link for Rheem-Paloma tankless troubleshoot and error codes:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/How-to-install-gas-water-heater.html#install

If unit worked before: Maybe bad PC board. Maybe lack of required yearly maintenance.
Common error codes can be caused by not following maintenance protocol such as cleaning combustion parts, checking gas pressure, checking venting, and air intake, bleeding gas line etc.
Too bad Rheem-Paloma manuals do not show HOW to conduct this maintenance, leaving customer with many unknowns, and no way to oversee that maintenance performed by hired technician is complete, and matches recommended maintenance.
Sell unit on ebay, and install tank-type gas water heater.

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

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



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

Does same thing happen at all faucets?
Are you getting error code?
You might have crossover problem with defective faucet cartridge.
Copy following links for troubleshoot resources:
http://waterheatertimer.org/pdf/No-Error-Code.pdf
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

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

This error code will occur for two reasons:

1. The heater has lost its programming and you will need a new programming chip from Rheem. (866) 720-2076
2. The igniter module is located behind the Printed Circuit board and will need to be relocated.

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.

get ready to pull that one out and get a different brand

worked on mine for a year and a half and replaced everything and the unit would still not run.

I have a Richmond tankless water heater PTG2-42PVN. It will work for a very short time & then I get an error code of either C4 or C7. The remote control alternately flashes IL - 120