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My ecosense tankless water heater model#ptg-74xn-2 has stoped heating water what could it be

It is not heating water after we replaced the fuses

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  • Water Heaters Master
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: Paloma tankless water heater model no PTG-74XP-2 error code c8

In several cases i have had to change the pcb board.... code 76 is no communication between remote thermostat and pcb..... this is a problem the first generation rheems seem to be having.... contact rheem if under warranty you will need to get pcb and program chip sent to you. Really need a experienced tech to install board and program it for you...... hope this helps...

Posted on Aug 24, 2012

gary1121
  • 332 Answers

SOURCE: 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

Posted on May 29, 2009

  • 5245 Answers

SOURCE: I NEED THE OWNERS MANUAL FOR RHEEM RTG-74XN-2

Open following link for rheem tankless resources, including manuals, error codes and typical maintenance.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Posted on May 19, 2012

  • 254 Answers

SOURCE: my ecosense tankless water heater #rtg-74pvn-2 says c8 13

It could be the ods sensor ,or may require adjustment of burner manifold pressure . you might want to contact Rheem 800432-8373

Posted on Mar 06, 2013

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1 Answer

Ptg 74pvn 2 rtg 74pvp


copy following links for rheem/eco-sense error codes, manuals, required yearly maintenance, support number and resources.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
Probably bad PC board, or bad remote control

Gene
h

Nov 22, 2013 | Rheem EcoSense by 4.2 GPM Tankless Water...

1 Answer

My rtg-74pjn-2 shows code c8 13


Hello Oumkaar Sharma,
Feb 2013

1) Copy following link for EcoSense-Rheem tankless resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

2) Error 13 is oxygen depletion sensor activated.
Get more fresh air to unit
Perform required maintenance.
Have qualified service technician test, clean, etc, and possibly replace burner.

3) Repair any brand tankless, same day, yourself for $368
http://waterheatertimer.org/How-to-install-gas-water-heater.html

4) Add a comment and say what you did to solve problem.

Mar 06, 2013 | Rheem Paloma PTG-74PVP / RTG-74PVP Liquid...

1 Answer

Error code c7 and 12 on an ecosense natural gas water heater


Before calling service technician, copy following link for ecosense tankless troubleshooting resources.
C7 is communication failure with remote, and C12 is flame failure.
Multiple error codes could mean bad circuit board, loose wire, low gas pressure, or simple communication problem with remote control.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Jul 24, 2012 | Rheem Paloma PTG-74PVN / RTG-74PVN...

1 Answer

What can cause Hot/Cold spikes on an RTG74-XN


Crossover, low hot water flow, low water pressure, sediment in water lines or heater, heat exchanger needs to be de-limed, water filter needs to be cleaned, water heater temperature set too high, incoming water temperature too high or too low depending on model, MUD or PUD districts with pressure spikes, dirty faucet aerators, loose wires, bad sensor, faulty PD-board, bad venting, dirty burner and combustion parts, etc.

Crossover
http://waterheatertimer.org/Crossover.html
Clean water filter monthly, de-lime tankless yearly
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf
http://waterheatertimer.org/pdf/Rheem-De-lime-tankless.pdf
No error code:
http://waterheatertimer.org/pdf/No-Error-Code.pdf
Overcoming fluctuating temperatures:
http://waterheatertimer.org/pdf/Bosch_Overcoming_fluctuating_temps.pdf
Resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Sep 20, 2011 | Rheem Paloma PTG-74XN / RTG-74XN Natural...

1 Answer

RTG-74XN2 won't put out hot water until about 9am.


Tankless questions are complicated because these units have many parts, and both internal and external issues can cause problems. Also problems can arise from combination of issues including maintenance, incoming water temperature, pressure, air quality, venting, water quality, water pressure, in addition to internal washers, gaskets, and parts functioning perfectly with each other over time.

Hot water only after a certain time of day indicates problem might be pressure related.
Which could be local water supply, or clog in line, or sediment on pressure sensor, failed pressure sensor, dirty in-line sediment filter, improper vent, or combination of things listed.

Rheem suggests calling service technician.
Service technicians train for years on one brand of tankless, and then see something new each day.
To understand why service technician is recommended, view number of UNanswered questions on following link showing one Rheem tankless model number.
http://www.fixya.com/tags/rtg_74pvn

I suggest avoiding tankless water heaters since all costs are energy.

geno_3245_288.jpg
Clogged pressure sensor after 2 years exposure to hard water. De-liming tankless will not prevent failure from hard water.

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you via e-mail while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Feb 21, 2011 | Rheem Paloma PTG-74XN / RTG-74XN Natural...

1 Answer

How can I tell how many BTU's my natural gas meter is rated to supply? I'm getting an error code 12 on my Rheem EcoSense 9.5 GPM 199,900 BTU Natural Gas Indoor Tankless Water Heater, so I'm guessing the...


I have a Rheem PTG-74XP tankless. I had the same code 12, low/inconsistant gas problem (assumption). In my case the gas (propane) pressure coming in was fine, the reason the flame rods/electrodes would not burn correctly was residue on/in them. It hasn't happened since they were cleaned. Hope this helps, dj :)

Feb 03, 2011 | Rheem EcoSense by 7.4 GPM Tankless Water...

1 Answer

I cannot find the pop off valve


Some tankless water heaters do not have a pop-off valve. It will be on the top or side if it has one.

Apr 23, 2010 | Rheem EcoSense by 4.2 GPM Tankless Water...

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