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

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My Richmond tankless water heater is flashing the error code 76 and C8

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1 Answer

Richmond is Rheem.
Following links are meant to assist resourceful do-it-yourselfer solve long term maintenance issues that tankless pose.

Error 76 is communication fault with remote control.
Check following links for Paloma 'Rheem" error codes:
http://www.palomastore.com/paloma_error_codes.html
http://www.palomatankless.com/owners/homeowner+trouble.lasso

Best place to start is your manual. Following link show typical Rheem manual with the words troubleshoot and maintenance throughout manual.
Read manual several times before buying product to see yearly maintenance requirement and complexity of tankless water heaters.
http://waterheatertimer.org/pdf/Rheem-RTG74IndoorOutdoor_owners.pdf

Rheem offers on-line chat, which you rarely see for typical tank-type water heater
http://www.rheem.com/products/tankless_water_heaters/customer_support/

Contact Rheem: they will usually kick you back to local service technician.
http://www.rheem.com/Contact.aspx

Check following link for recall list:
http://www.tankless-recall.com/tanklessSearch.aspx

Rheem website is not easiest to navigate, but manuals appear for current models.
http://www.rheem.com/products/tankless_water_heaters/

Read other Rheem questions at fixya to gain wider experience with potential problems and solutions.
http://www.fixya.com/tags/rtg_74pvn

Install DIY tank-type gas water heater and avoid the whole headache
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Post question on pro water heater forum: This is where I go to catch up on latest info in fast-evolving water heater industry.
http://www.thetankatwaterheaterrescue.com/forums/forum3/

Pay for answer at fixya:
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.

Posted on Mar 18, 2011

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Get hot water from your Rheem tankless during a code 76 error


This doesn't always work, but on the Rheem tankless Gas/Propane water heater, if you're experiencing a code 76 error; disconnect the remote control unit (either from the water heater or the remote) by lifting the wires for the remote connection. Typically you'll get a C1-C8 error code, followed by a code 76; if you're getting a straight code 76 and nothing else, this procedure probably won't work.
Code 76 is a total power supply failure on the printed circuit board (PCB) assembly, which is the communication/power supply for the remote control unit. But, if you're getting a supplemental code (C1-C8) this procedure will most likely supply you with hot water until the replacement PCB arrives.

on Dec 01, 2009 | Rheem Tankless water heater for 1-2...

1 Answer

I have a richmond takless water heater with codes c8-76 . what is that and how can i fix it?


1) Rheem -Richmond error 76: communication error with remote, bad remote or failed PC board
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

2) Rheem will send PC board and you can replace yourself

3) Add comment and say what you discover.

Mar 08, 2013 | Water Heaters

1 Answer

Code C8-76?


PC board is probably bad.
Rheem, Richmond, Ruud, Paloma, etc will send you another PC board, and hopefully the success rate will equal success rate of replacing motherboard on your computer.
Before calling service technician, copy following link for troubleshoot resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Aug 02, 2012 | Rheem Water Heaters

1 Answer

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...

Jan 25, 2012 | Rheem Paloma Tankless Water Heaters...

2 Answers

Have a Rheem PTG-74PVP tankless water heater. Shuts off after a few minutes while taking a shower. Get a code 76 C8


Before calling service technician, open following links for troubleshoot resources including error codes and rheem chat, and typical scheduled maintenance:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf

Error 76 can mean communication failure between tankless and remote control, which can include bad remote control, bad wire, bad wiring connector, or PC board failure.
Disconnect remote control and see if tankless will work.
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf

Error C8 76 can mean PC board failure.
Contact Rheem and/or service technician.

Take a moment and rate answer:
And 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.

Sep 07, 2011 | Rheem Tankless Hot Water Heater...

1 Answer

Remote is flashing C8 and 76, alternating. I turn the unit off, then back on, and I get hot water for about 10 seconds, then it goes cold and the same error message occurs. Unit is Rheem Main Remote...


Before calling service technician, open following links for Rheem tankless resources including error codes and Rheem chat.
Disconnect wires from remote to see if system stabilizes. Unit will heat to default temperature without remote.

Error codes are considered start-point for troubleshooting.
C8 76 can mean PC board failure.
76 can mean communication failure with remote control
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/pdf/ErrorcodeTroubleshooting.pdf
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf

Jul 31, 2011 | Rheem Tankless Water Heater Main Remote...

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...

1 Answer

C7 andC8 plus 76 flashing on my remote


C7 C8 76 error code, can be PC board fault, and/or communication fault with remote.

Open link to read one possible solution:
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.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

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.

Dec 16, 2010 | Rheem Tankless Water Heater Main Remote...

1 Answer

New Richmond tankless water heater C8 error


I think error code C8 is #13
It has to do with air quality, lack of sufficient air, or lack of venting or dirty air filter.
Check following links to see if they have information:

Check following link for recall list:
http://www.tankless-recall.com/tanklessSearch.aspx
Manual shows error 05 or 13:
http://waterheatertimer.org/pdf/Rheem-RTG74IndoorOutdoor_owners.pdf

Sep 01, 2009 | Rheem Tankless Hot Water Heater...

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