Question about Rheem EcoSense by 7.4 GPM Tankless Water Heater Natural Gas High Altitude

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I get a P1 error code on my Paloma tankless water heater. It blinks between the P1 and the tempature setting

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Water inlet temperature to the heater is the same as preset on the controller.
I had this happen to me becouse I have a solar tank with temp of
135 farenheit.
Once I bypassed the sollar tank..no problem

Posted on Nov 09, 2009

  • johenkel Oct 12, 2010

    My plumber just took my check valve out. I guess there is some hot water flowing backwards.

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Clean shower head or faucet with CLR soultion and remove any water saving device of the fixture as this reduce the amount of hot water volume needed to be pulled from tankless water heater to operate properly.

Posted on Oct 05, 2012

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1 Answer

Code P1 appears in my Paloma gas water heater


Copy following link for troubleshoot resources Rheem/Paloma tankless:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/images/Rheem-service-valves.jpg
http://waterheatertimer.org/Crossover.html

Error P1 is not enough water flow.
Clean water filter located on cold water inlet at top of cold pipe when cold enters unit
Test single handle faucets for crossover
Check if faucet can fill 1 gallon can in 30 seconds.

Apr 15, 2013 | Water Heaters

1 Answer

What does code 36 mean


Error code 36 does not show in Rheem tankless manuals.

Copy following link for general troubleshoot and error codes, and Rheem contact information:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error code 36 does not show in any resource, including 2008 service manual, or 2012 product manual.
Check that remote control display is illustrating the correct number.
For example there is error code 35.

Oct 19, 2012 | Rheem Paloma Tankless Water Heaters...

1 Answer

Error 13 paloma tankless hot water system. no hot water


Before calling service technician, open following links for error codes, Rheem/Paloma chat and tech support, and possible manual:
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.
Tankless manuals recommend yearly service including burner cleaning, gas pressure and plumbing check, de-liming etc to prevent problems and so technician is familiar with that specific unit.

Aug 05, 2011 | Rheem Paloma PTG-74PVN / RTG-74PVN...

1 Answer

PTG-53XN error code p1. And hot water turns off.


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

Error codes are considered start point for troubleshooting, and can sometimes mislead.
Error P1 is 'not enough water to operate the unit:'
http://waterheatertimer.org/pdf/Rheem-Error-code-P1.pdf

This problem can be caused by plumbing problems such as crossover, or clogged water lines, or dirty water filter, or clogged water softener, or temperature of unit set too high. Or combination of these problems.
Remember if temperature is set very high, then more cold water is used at the faucet. This means less hot water is drawn through the tankless water heater, so the flow rate may drop below activation threshold.
http://waterheatertimer.org/Crossover.html
http://waterheatertimer.org/Low-hot-water-pressure.html

Jul 08, 2011 | Rheem Tankless Hot Water Heater...

2 Answers

Getting a 76 flashing on my Paloma PTG-74XP tankless water heater


Error code 76
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf
http://waterheatertimer.org/pdf/Rheem-Tankless-Fault-codes.pdf

Open following link for Rheem/Paloma/Richmond/Ruud tankless troubleshoot resources including error codes, self help, manuals, parts links, tips, and contact information.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Read manual cover to cover, make sure tankless receives yearly maintenance as outline in manual.

Add a comment with your experience so others with same-similar problem can benefit.

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.

Mar 30, 2011 | Rheem Paloma PTG-74XP / RTG-74XP Liquid...

2 Answers

Have a p1 flashing on the remote control and no hot water. I have tried shutting the water and power off and still a p1 flashing on the control unit.


P1 is reportedly defective check valve that can cause water flow to decrease, and tankless not heat water smoothly. But can also be other causes, or combination of causes. Call service technician, contact Rheem, or replace check valve and see if problem solves. Then add a comment with solution so others can benefit from your experience.

Open following link for Rheem/Paloma/Richmond/Ruud tankless troubleshoot resources including error codes, self help, manuals, parts links, tips, and contact information.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

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.

Mar 13, 2011 | Rheem Water Heaters

1 Answer

My tankless indoor water heater has an error code C4 76


Error code 76 indicates a communication error with the electronic board and the unit. Call Paloma/Rheem with the serial number and model number of your unit and they will, in most cases, send you a new board with instructions on how to easily replace the board.

Tech Support: 800-432-8373.

Nov 21, 2010 | Rheem Paloma Tankless Water Heaters...

1 Answer

Paloma tankless ptg42 water heater error code c4/13


4 error message, the 4th (last) error code is #13, not enough oxygen.

Check the location of the heater, if it is fine the ODS sensor (actually is a thermal couple) is bad.

Dec 25, 2009 | Rheem Paloma Tankless Water Heaters...

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