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

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Have a paloma PTG 42 Pvn water heater, it shuts off int, flashes code c4 12, ive checked the gas flow and its fine, unit used to work ok after install, seems to be better in am after unit has not been used overnight, any suggestions?

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Http://www.seisco.com/pages/service-diagnostic-tables.html
Hi, this is the same series, and it shows you all the codes and fixes, usually though,it nearly always has to do with the, temperature, the hotter they get they seem to fail, ( Which is probably why it works better in the morning after sitting and cooling down all night?) So this suggests that it has something to do with the thermostat, sensor, driver &/or the unit itself. One simply has to work through all the troubleshooting steps and isolate the faulty component(s). Use the site above to assist you.

Posted on Aug 26, 2010

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I have a paloma tankles water heater model #ptg-42pvn i am getting an intermitent error code C4,12. what is the problem?


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.

Mar 20, 2013 | Rheem Paloma PTG-42PVN / RTG2-42PVN...

1 Answer

What size venting do I need for the ptg-42-pvn?


3" category III stainless for special venting

Tanklessking shows Category III stainless steel vent kit for this model
3" vent
http://tanklessonline.com/rheem-water-heaters-RTG42.html

ptg-42-pvn has minimum 31,000BTU and max 118,000BTU
Max water temperature 120 degrees F
Spec sheet says: 3" special venting
http://www.palomatankless.com/products/42/specifications.html

Hart and cooley show special vent 3" stainless thru-the-wall vent
http://www.hartandcooley.com/specialgasvent/PDF/851515%20Tankless%20Water%20Heater%20Installation%20Vent%20Kits%20sell%20sheet%20-%20HC%20-%20low%20res.pdf

Hot water sources shows thru-wall or thru-roof
http://www.hotwatersource.com/RTG42PVN-Rheem-Indoor-Natural-Gas-Tankless-Water-Heater/RTG42PVN,default,pd.html

http://waterheatertimer.org/pdf/Tankless-roof-vent-installation.pdf

Aug 17, 2011 | Rheem Paloma PTG-42PVN / RTG2-42PVN...

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...

5 Answers

Paloma tank less water heater flashes code C4 13 and we have no hot water?how to fix it?


I had the same problem with my Paloma a year and a half after installation...contacted Rheem customer service (800-432-8373) and they recommened a local installer in my area. The technican diagnosed the problem as the "flow control valve"; he managed to get Rheem/Paloma to cover the part under warranty...I only had to shell out the money for the install.

Nov 16, 2009 | Rheem Paloma Tankless Water Heaters...

5 Answers

I have a paloma tankless water heater about 3 years old model PTG-74PVN and it works for 2 minutes and shuts off with error code C4 and 13 flashing. (City water pressure is fine)Can anyone help? Thanks...


I had the same problem with my Paloma a year and a half after installation...contacted Rheem customer service (800-432-8373) and they recommened a local installer in my area. The technican diagnosed the problem as the "flow control valve"; he managed to get Rheem/Paloma to cover the part under warranty...I only had to shell out the money for the install.

Nov 03, 2009 | Rheem Paloma PTG-74PVN / RTG-74PVN...

1 Answer

Paloma PTG 74PVN Tankless Water Heater


did you check the filters on the the water valves, i am not exactly sure about your codes that are shoeing but if you could read it and post them, i know on some of the units 76 means there is low water pressure and the filters are behind 2 caps one on each side above the shut off valve take off the caps and remove the screens, clean them and replace them ,, make sure you turn off the water on both side first or you will get wet

May 18, 2009 | Rheem Paloma PTG-74PVN / RTG-74PVN...

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