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

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Error code LO 76

Rheem tankless water heater outdoor natural gas. We have changed the remote thermostat and checked the wires. When we run the water it will heat the water. The remote shows 120 for as long as the water is running. Once the water is turned off the remote thermostat will flash the error code and will not heat again. To get it to work we have to turn the remote off and then on. All electrical connections have been checked at the remote and the outside unit and it all looks fine.

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A couple of things, the error is a communication issue with the remote. Check the connections to the remote if fine bypass the remote to see if its working if still faulting when bypassed try a new remote and if still faulting worse case you will have to replace the PCB (printed circuit board) see if it is still under warranty if you have to replace any parts. I have a link with lists of faults for easier access in the future.

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Posted on Sep 26, 2009

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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

Error code C4 76


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

Copy following link for Rheem tankless troubleshoot:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Call Rheem, and they will recommend service technician.
800-432-8373

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.

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

2 Answers

Error code c7 76 disconnected remote started heater had hot water for a few minutes then back to original problem. No hot water.


Before calling service technician, open following link for Rheem troubleshooting resources, and contact information:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error codes are considered start place for troubleshooting:
http://waterheatertimer.org/pdf/ErrorcodeTroubleshooting.pdf
Error code troubleshoot indicates: replace PC board if water heater does not function without remote.

Add a comment and say what you did to fix problem.

Jun 15, 2011 | Rheem RTG-53PVN Indoor Natural Gas...

1 Answer

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:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://www.fixya.com/tags/rtg_74pvn

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.
http://waterheatertimer.org/pdf/DirectVentManualRTG-74PVN-1.pdf

Add a comment for more help.

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...

1 Answer

Can you tell me why my heater turns off when I turn on my washer and the kitchen sink and its not just when Im washing its also when I shower.. and the error code is C76 or Double 00


No I don't know why it turns off and gives error code 76.
Those two things seem unrelated.
Before calling service technician, open following link for Rheem troubleshooting resources.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error code 76 for possible remote control solution:
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf

Lime build-up is one possible cause when tankless cannot heat water fast enough and turns off
How to delime tankless
http://waterheatertimer.org/pdf/Rheem-De-lime-tankless.pdf

Apr 20, 2011 | Rheem Paloma PTG-74PVN / RTG-74PVN...

1 Answer

When taking a shower the hot water turns off. When I go to the tankless water heater it says C4 76. What does this mean?


Before calling service technician, open following link for Rheem troubleshoot resources including error codes and typical manuals.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
C7 76 is problem with remote control. Following link might help.
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf

Read manual cover-to-cover to make sure your tankless water heater receives yearly maintenance required for unit to continue working.
Tankless are maintenance heavy which can quickly eliminate any promised energy savings unless you de-lime and troubleshoot and read tips-and-tricks others have written and glean information from service technician who visits your house. Mostly glean how much tankless repairs and parts cost vrs buying whole new tank-type gas water heater at local box store, since all costs are energy.

Feb 18, 2011 | Rheem RTG-74PVN-2 Natural Gas Pronto Whole...

1 Answer

Unit shuts off when in use, code C7, 76


Before calling service technician, open following link for Rheem troubleshoot resources including error codes and typical manuals.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
C7 76 is problem with remote control. Following link might help.
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf

Read manual cover-to-cover to make sure your tankless water heater receives yearly maintenance required for unit to continue working.
Tankless are maintenance heavy which can quickly eliminate any promised energy savings unless you de-lime and troubleshoot and read tips-and-tricks others have written and glean information from service technician who visits your house. Mostly glean how much tankless repairs and parts cost vrs buying whole new tank-type gas water heater at local box store, since all costs are energy.

Feb 17, 2011 | Rheem RTG-74PVN-2 Natural Gas Pronto Whole...

2 Answers

FLASHING CODE C-7 WILL WORK FOR A WHILE THEN STOPS


disconnect the remote and see if the unit works properly; could be lost comm. between the burner control module and the burner assembly.

If your getting error code 76; contact Rheem customer support at (800-432-8373) and notify them IF you are getting a code "76" error

Mike...

Nov 15, 2009 | Rheem RTG-74PVN-2 Natural Gas Pronto Whole...

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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