Question about Rheem Paloma PTG-74PVN / RTG-74PVN Natural Gas Indoor

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Rheem RTG-74PVN-1 Water heats for abot 2 minutes

Rheem RTG-74PVN-1 Water heats for about 2 minutes then shuts off. Thermostat flashes 76 and C4

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

Posted on Oct 29, 2009


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Ptg 74pvn 2 rtg 74pvp

copy following links for rheem/eco-sense error codes, manuals, required yearly maintenance, support number and resources.
Probably bad PC board, or bad remote control


If you need further help, I’m available over the phone at

Nov 22, 2013 | Rheem EcoSense by 4.2 GPM Tankless Water...

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Error code C4 76

Error 76 is communication fault with remote control, or bad PCB board.

Copy following link for Rheem tankless troubleshoot:

Call Rheem, and they will recommend service technician.

Make sure your unit is serviced yearly to prevent common error codes. Which defeats the robust $100 expected yearly savings from owning a tankless water heater.

If you need further help, I’m available over the phone at

Oct 13, 2012 | Rheem Paloma PTG-74PVN / RTG-74PVN...

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Burner lost comm with the remote code c4 76

Check thermostat connections.......check thermostat leads to the unit.......To check remove thermostat wires(leads) from unit and see if unit comes on and works, unit should work and heat to 120 degrees factory set. If unit does not fire off then problem is the pcb(printed circuit board) and will need to be replaced . When new board arrives it will need to be programed...... hope this helps....

Sep 06, 2011 | Rheem RTG-74PVN-2 Natural Gas Pronto Whole...

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We have enjoyed a Rheem Thermostat and a Paloma Eco Sense tankless gas water heater #RTG-74XN-2 for 2 and 1/2 years, but now there are error codes flashing and resetting the thermostat doesn't hold. ...

Before calling service technician, open following links for Rheem troubleshooting resources, including generic error codes and contact information for Rheem and recent manuals:

Error codes are start place for troubleshoot, and multiple error codes can indicate bad PC board.
Same error code on one machine can be different cause and solution than another machine.

Error 76 is usually communication problem with remote control.
Disconnect wires from machine, and clean terminals is a start point.
Wire between machine and remote might be bad, or remote control is bad, or PC board or wiring connections are bad.

The problem might be solved by having technician catch the machine up on yearly maintenance.

Manual for same-similar product shows maintenance and troubleshooting and a few error codes, but not 76:
For the most part, the manual recommends calling service technician instead of offering DIY details.

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Upvote the help.
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.

Jun 05, 2011 | Rheem Paloma PTG-74XN / RTG-74XN Natural...

2 Answers

Rheem Tankless wh model rtg-74pvn shuts off error code c4 76

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

Nov 01, 2009 | Rheem RTG-74PVN-2 Natural Gas Pronto Whole...

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Had a Ploma unit - same as Rheem. Not sure what C4 is...but code 76 is lost comm between the remote control and the burner control module. Unplug unit = take front cover off...their should be a square circuit card assemble in front of you. Top blow capacitors are typically used in todays electronics, and they have an obvious curve if the capacitor is blown. If the caps appear swolen on the top they are blown. STOP! If your unit is less than 5 years manufacturer for defective power supply. This particular problem is known to the MF...If you have a Poloma/Rheem they send you step by step instructions on how to replace this board yourself...if you're slightly technical you can do this repair yourself.

Oct 26, 2009 | Rheem Paloma PTG-74PVN / RTG-74PVN...

2 Answers

Rheem water heater turns off by its self

Flashing code 76 is lost communication between the remote and the burner control assembly CCA (circuit card assembly). The CCA is still under warranty if purchased within the last 3 yrs. Contact Rheem customer service and have your Mod. and S/N available....explain to the agent you are recieving - flashing code 76...they'll walk you through the process.

Oct 04, 2009 | Rheem Paloma PTG-74PVN / RTG-74PVN...

1 Answer

I have a 2 year old paloma tankles heater i get a c4 76

Make sure the wire connecting the thermostat to the unit is 18 gauge solid copper thermostat wire

Aug 16, 2009 | Rheem Paloma PTG-74PVN / RTG-74PVN...

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