Question about Rheem Paloma Tankless Water Heaters PTG-74PVN Tankless RTG-74PVN

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No hot water this AM. I unplugged and reset the Paloma 7.4 NG unit, bled the gas line, tied in the remote (which I didn't use before), cleaned the water filter, and increased the temp to 110. The unit goes on most of the time, however there are times that is flashes "76". Is that the temp of the water going into it? Sometimes lose the hot water.

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1 Answer

Need to convert Paloma gas heater from natural gas to lpg in qld.


You can't!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Among other things besides having to reprogram modulation, you'd also need to re-jet it and that's not possible in the field. NG and LPG jets are not the same due to vastly different operating pressures.
Some brands can be field converted but not Paloma/Rheem/Richmond/Rudd Tankless units!

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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.

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http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://www.fixya.com/support/t3444443-paloma_tank_less_water_heater_flashes

Error codes are considered start-point for troubleshooting.
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Rheem, Richmond, Ruud, and Paloma are all the same manufacturer. After about 9 months, my tankless RTG-74PVN started giving me error code 11 and cold water!. I fixed it by cleaning the burner, as shown in this video:
www.howtolou.com/clean-a-burner -Lou

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2 Answers

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Remove power source from the unit. If remote control is installed; remove cover and lift the control wires on the terminal...can be accomplished from either end.

Restore power and see if unit functions normally.

Contact Paloma/Rheem customer (800-432-8373) support and notify them IF you are getting a code "76" error. Rheem has recently extended the warranty on the "Burner Control Assm."; which is your problem. The C4-C8 portion of the error code, is where the unit stops the ignition process...burner fails to light, or gives you intermittent hot water. In either case, contact customer support.

If this helps, please indicate so.
Mike//jzklipper

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1 Answer

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You have a bad igniter, and the sensing switch is shutting the fan off because the igniter is not functioning properly.

The average cost is about $150 for the part.

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1 Answer

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