Question about Rheem Water Heaters

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My tankless water heater is showins codes and getting cold

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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.

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Posted on Apr 02, 2011

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Posted on Jan 02, 2017

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Thermostat is set @120 then drops to 65 and starts flashing. Water get cold. What is the reason . Thanks


Rheem Paloma tankless computer? No error code? One possible cause; Crossover caused by bad single handle faucet cartridge drawing cold water into line causing shut down of tankless burner?
Copy following links for resources:
http://waterheatertimer.org/Crossover.html
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
Add a comment as needed.
Gene
hh

Aug 19, 2013 | Rheem Paloma PTG-74PVN / RTG-74PVN...

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

I have a new Richmond tankless. Every time someone turns on the water for a second the water heater comes on for a second. Is this ******* the unit ? I tell people to just use the cold water tap if th


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

If tankless comes on when HOT tap is turned on, then that is normal.
If tankless comes on when cold is turned on, then you might have crossover:
http://waterheatertimer.org/Crossover.html
If tankless comes on when single handled faucet is lifted in center, then that draws water from hot pipe and will activate tankless > so don't install single handled faucets to save water heater energy, regardless what type water heater you have.

Tankless require monthy-to-yearly maintenance to avoid common error codes. The product manual recommends yearly service. Since Rheem does not post service manuals, you generally have to pay somebody to take apart and test the unit. The cost of this far outstrips expected savings from owning expensive water heater that requires lots of maintenance, yet is heavily promoted as the solution to water heater problems.

Never install tankless water heater is best way to avoid complications of expensive water heater that is maintenance heavy, hard to diagnose, expensive to fix, etc.
Never expose tankless to more than 11 grains hard water.
http://waterheatertimer.org/pdf/Rheem-CondensingTankless-maintenance-2012.pdf

Aug 25, 2012 | Rheem Richmond Encore Condensing Tankless...

1 Answer

Have an Ecosense Tankless Water Heater with error code C7. It then flashes to 76 degrees and gives cold water. How do we remedy?


Before calling service technician, open following links for troubleshooting resources and typical manuals.
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Tankless water heaters require yearly maintenance.
Many causes for common error codes are covered in the yearly maintenance.

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1 Answer

I have a RMTG-53dvn piped in parrallel with a traditional water heater because I used to have two traditional in parallel. The unit never kicked on with no trouble code, so I piped in series with a...


I could see how it might not work in parallel. Much water would go thru the conventional heater, so there would be low flow thru the tankless.
Now, the tankless is getting hot water from the conventional. Try shutting the conventional heater's power source off so the water gets cold, then see what happens with the tankless.
Gary

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1 Answer

Rheem tankless water heater error code C4 13??


check diaphrapm valve or micro/switch best of luck

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