Rheem rtg-74pvn2 will heat for a couple minutes, then, shuts off and flashes C8 76 on remote controller. I have insured good connections on both ends of cable, even replaced cable, same problem.

Troubleshoot and error codes following link:
http://waterheatertimer.org/pdf/RTG-error-codes-3.pdf

Not getting gas, low gas pressure, air in gas line, igniter not aligned with burner, wires disconnected, unit not grounded ...

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Sorry to read about your problem, I hope this helps you out.
Your code 76

Communication Fault with Remote Control
Check remote control wiring for loose or damaged connections. Bypass remote control cable by connecting remote control directly to remote control terminals on PCB. Replace cable if found to be faulty. Replace remote control. Replace PC

I tried to help you. Please help me and Rate/Vote on my response, thanks and good luck

Contact Paloma/Rheem 866-720-2076. Super nice! I just called regarding mine. Having same problem Rheem Paloma sending parts out tomorrow overnite. Try turn it on/ off by moving tiny switch under the unit that tells you the temperature. Run your fingers along the bottom to find it. That is a temporary fix. Below is a website with all the error codes, so you know what is wrong. Good luck and blessings!

http://www.palomastore.com/paloma_error_codes.html

76
Communication Fault with Remote Control Check remote control wiring for loose or damaged connections. Bypass remote control cable by connection remote directly to remote control terminals on PCB (replace cable if found to be faulty). Replace remote control. Replace PCB

76
Communication Fault with Remote Control Check remote control wiring for loose or damaged connections. Bypass remote control cable by connection remote directly to remote control terminals on PCB (replace cable if found to be faulty). Replace remote control. Replace PCB

76
Communication Fault with Remote Control Check remote control wiring for loose or damaged connections. Bypass remote control cable by connection remote directly to remote control terminals on PCB (replace cable if found to be faulty). Replace remote control. Replace PCB

76
Communication Fault with Remote Control Check remote control wiring for loose or damaged connections. Bypass remote control cable by connection remote directly to remote control terminals on PCB (replace cable if found to be faulty). Replace remote control. Replace PCB

This is something you will have to contact rheem about due to the fact you don't have a fault code

I had that happened twice to me by now.
Turns out to be dirty burner unit.

I got a "removal cleaning reinstallation" bulletin for the model 74 that I went by.
I basically took the burner unit apart cleaned it out (compressed air) and put it together again.
That did it.

johenkel

Remove power source from the unit. If remote control is installed; remove cover and lift the control wires on the terminal...can be accomplished from either end. See if the unit runs longer.
If you're receiving any error codes, especialy code 76; contact RHeem customer support at (800-432-8373) and notify them IF you are getting a code "76" error.

Good luck,
JZ...

Contact Rheem; the Burner control unit has lost comm with the remote...the part is warranteed for up to five years.

overheat stat or fan, on fan check for small pinhole in rubber tube best of luck

Remove power source from the unit. If remote control is installed; remove cover and lift the control wires on the terminal...can be accomplished from either end.

Restore power and see if unit functions normally.

Contact Paloma/Rheem customer (800-432-8373) support and notify them IF you are getting a code "76" error. Rheem has recently extended the warranty on the "Burner Control Assm."; which is your problem. The C4-C8 portion of the error code, is where the unit stops the ignition process...burner fails to light, or gives you intermittent hot water. In either case, contact customer support.

If this helps, please indicate so.
Mike//[email protected]

your not getting enough fresh air to it. where is it located? you need 1 square inch per 1000 btu's. it's having irregular combusion.