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Paloma tankless water heater. Keeps shutting down with code C4 76. What does this code indicate?

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I am not familar with this brand of heater but it has been my experience with all heaters that the codes and explanation are located inside the panel door. You'll proably have to use a screwdriver to take the cover off.

Posted on Oct 07, 2009

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

1 Answer

C4,76 what is it?


Before calling service technician, open following link for Rheen troubleshooting resources and possible error code help plus link to Rheem chat:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Typically, error codes are start-point for troubleshooting.
Error 76 is communication fault with remote control, which can be bad remote, bad wire, bad wiring connection, or bad part inside tankless.
C4 is oxygen sensor problem or bad venting.
More than 1 error code, or mixed error codes can indicate problem such as bad PC board -or- PCB.

Jun 23, 2011 | Rheem Tankless Hot Water Heater...

1 Answer

My tankless indoor water heater has an error code C4 76


Error code 76 indicates a communication error with the electronic board and the unit. Call Paloma/Rheem with the serial number and model number of your unit and they will, in most cases, send you a new board with instructions on how to easily replace the board.

Tech Support: 800-432-8373.

Nov 21, 2010 | Rheem Paloma Tankless Water Heaters...

1 Answer

My paloma tankless water heater will shut off in the middle of a shower


I am not sure if this is it but I had mine at too high of a temperature therefore I was not using enough volume of hot water to keep the heater on. They have a minimum amount of flowrate to sustain. Try turning the water temp down to 125-130. Hope this helps

Jan 27, 2010 | Rheem Paloma Tankless Water Heaters...

1 Answer

My paloma tankless keeps failing with a code of


SINCE U DIDN'T PROVIDE A MODEL NUMBER, THE BEST I CAN DO IS GIVE U THEIR PHONE NUMBER:
1 800 873 3507

Dec 08, 2009 | Rheem Paloma PTG-74PVN / RTG-74PVN...

2 Answers

PALOMA PTG-74PVN-1 Code C8 12 my water heater


C8 is the last stop in the point of burner ignition and a total of eight error codes. Error code 12 is a supplemental code that means your LP gas supply is too low...have your LP tank service and try again.

HTH,

Mike...

Dec 06, 2009 | Rheem Paloma Tankless Water Heaters...

1 Answer

I have a paloma ptg-74pvn and the digital temp. display keeps shu


How reliable is your AC? With the digital r/c connected, every time the heater recovers from power outage it's in the OFF default state. If you can not fix the power issue, disconnect the remote control. The w/h will recover in the ON state.

Nov 13, 2009 | Rheem Paloma Tankless Water Heaters...

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