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

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Paloma (Rheem) tankless water heater 7.4 gpm 199,000 btu outdoor unit. Red light is blinking on pc board. unit fires up for approx 2 seconds then shuts off, then cycles once more for 2 seconds and shuts off. It is showing error code c7 12 but is getting plenty of propane to the unit. It has run for 3 years. The burners have been cleaned, that ain't it. I think it might not be getting flame confirmation how do I fix that? Mitch

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I think your flame sensor is bad but you will need to confirm that with rheem i am unsure what the c7 is for but code 12 is flame failure and there could be carbon build up on the flame rod...

Posted on Aug 12, 2010

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1 Answer

Does the water heater produce radiant heat to the exterior of the unit


1) No.
NO.
Do NOT store combustibles close to a water heater, fireplace, or any source of ignition, including HVAC, space heater, microwave, appliance, etc.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html#bang

2) Tankless water heaters do not have FVIR safety features found in tank-type gas water heaters rated less than 60,000 BTU.

3) Tankless water heaters draw large amounts of air into combustion chamber from surrounding room, and this air feeds directly into the burner flame with no barrier.

4) If flammable vapors enter tankless, then it can cause fire, explosion, conflagration.

5) Read product manual and safe a life.

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2 Answers

We are getting multiple codes. Can someone help us. Last year we got cod c2 11 which we found out we just have to clean the probes in the unit. So we did that yesterday again and everything worked great,...


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

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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.

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1 Answer

HOW TO FIX ERROR 79 ON THE PALOMA GAS WATER HEATER MODEL PH-241CWH (1)


Use following link for Rheem/Paloma/Richmond/Ruud tankless troubleshoot:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

http://www.palomastore.com/paloma_error_codes.html
Range of problems can vary from fan motor wiring, to remote control terminals (error 76), to bad remote, to bad circuit board.
1) Replace remote control
2) Read error 76 and 79 shown in link above
3) Contact local service technician
4) Contact Rheem

Add a comment for more free help.
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.
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Dec 29, 2010 | Rheem Tankless Hot Water Heater...

3 Answers

I have an error code of c2 11 on rheem model number ptg-74pvn-2 I will get warm water for about 5 seconds and then it goes cold


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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1 Answer

My tankless heater will not turn on and the remote


my rheem pronto tankless water heater will not turn on?

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