Question about Rheem Tankless Water Heater Main Remote Control

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I have no hot water. My remote shuts off and when I turn it back on it says 100 then flashes 76, then -0 then shuts off.

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  • 248 Answers

Could be overheat stat or fan

Posted on Oct 25, 2009

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I have Model PTG2-42PVN it shuts off and the remote flashes C7 and 76. What does this mean???


Could be the remote control. Disconnect remote and see if tankless works fine.

Probably bad PC board. Rheem will send new board and you can install yourself.

Bad PC board is kind of like the motherboard on your computer, so expect same level of performance after replacing motherboard ... which usually means the computer's days are numbered before another major problem.

Copy following links:
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Sep 18, 2012 | Water Heaters

1 Answer

C4 76 error code on richland waterheater


Richland tankless is made by Rheem.
C7-76 is communication fault with remote.
Turn off power at remote and wait 5 minutes, turn power back on at remote, and see if problem clears.
If problem continues, read below:

Before calling service technician, open following links for troubleshoot resources including error codes, Rheem chat, typical maintenance manual:
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Tankless water heater, more than any other type of heater, need to be maintained.
Maintaining tankless will probably not affect C7 76 fault code, but can prevent many other common error codes.
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf

Sep 14, 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...

1 Answer

My tankless remote digital controller won't go above 76 degrees F


76 is an error code. Look in the owners manual and it will tell you what the problem is.

May 31, 2010 | Rinnai Digital Remote Water Heater Control...

2 Answers

CODE C 4776 COMES ON DISPLAY AND UNIT SHUTS DOWN HOW DO I FIX THIS PROBLEM


Check the gas inlet pressure as I am guessing this is an LP unit. Most of these problems come from a poor installation. Gas pipe too small, gas pressure too low, not enough combustion air. The other cause of error codes is a unit plugged into an extension cord. Also, if the flue is not installed properly, condensation can come back and damage the unit.

Apr 04, 2010 | Rheem Tankless Hot Water Heater...

1 Answer

My tankless heater will not turn on and the remote


my rheem pronto tankless water heater will not turn on?

Sep 24, 2009 | Rheem Tankless Hot Water Heater...

4 Answers

Rheem Eco-180dvn. Error code 12


actually, does it give you a big rumble? if it does, then your problem is that the meter's btu's are not high enough and there's too litle gas getting to the heater so it's blowing itself out, basically. you'll need to call your gas provider and ask for them to bring in a higher btu meter. around 220,000 btu meter is best, so your furnace and gas stove(if you have one) dont take to much gas themselves, meaning dont get a 180,000 btu meter, because it would only be able to supply the heater.

Sep 19, 2009 | Rheem EcoSense by 7.4 GPM Tankless Water...

2 Answers

Rheem tankless shuts down on it's own.


Check to make sure wire is solid copper thermostat wire and not stranded

Aug 15, 2009 | Rheem Tankless Hot Water Heater...

1 Answer

No hot water


check the flue and make sure nothing is in it, nothing can be obstucting the flue or it will shut down on carbon monixide make sure nothing is in it if you have to take it apart do so it just slips together

Jun 07, 2009 | Rheem Tankless Hot Water Heater...

7 Answers

Rheem RTG 53 PVN with fault codes C4 or C7


I had the same problem with my tankless waterheater (flashing c4 76 alternately). I called Rheem
tech support and they had me 1 power down the remotepanel 2 unplug the unit from the wall 3 remove the cover 4 remove the wires for the remote panel from the circuit board and pull the twisted pair that goes to the remote out from the bottom of the unit. 5 reinstall the cover 6 plug the unit back
into the wall and turn on the hot water see if it works. It did in my case and they are sending me a new remote panel. I hope it helps.........

Nov 21, 2008 | Rheem RTG-53PVN Indoor Natural Gas...

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