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

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I am waiting for circuit board part to be delivered. I have tried to disconnect wires from behind remote control (didnt work). Is there any other way to jump start hot water until my part arrives?

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If you open the cover and look at the PCB ther're four capacitors on the left hand side of the board - If the tops of thos caps are slightly raised...ther're blown - you'll have to replace them to get the unit to work.

Parts are available at radio shack or Allied Electronics - or you could find a supplier in your area.

To replace the caps 1)Unplug/remove A/C power. 2)Label and remove all electrical connections to the PCB and remove the PCB from the water heater unit. 3)With the PCB sitting on a flat surface...rotate PCB until the single silver screw is in the top left corner (the caps in question should be in the mid portion of the PCB and on the lefthand side facing the board. 4)Remove the screw from the top left corner...firmly hold the plastic case containing the PCB and gently start bending the plastic case back, until the silicone protectant starts to separate from the plastic on all four sides. Once you have the silicone separated the PCB should pop out of place with some gentle nudging. 5)Remove the protectant from around the caps and remove from the associated area on the back as well. 6) De-solder and replace caps (2 ea/670X25V and 2 ea./220X35V) - available at electronics supplier.

Posted on Nov 16, 2009

  • Michelle Oliver Nov 16, 2009

    Correction first cap is 470MF@25V.

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1 Answer

What is error code 76 on a Rheem tankless hot water heater that has propane connection?


Communication Fault with Remote Control. At a minimum check the following: 1. Check remote control wiring for loose or damaged connections. 2. Bypass remote control cable by connecting remote control directly to remote control terminals on PCB. Replace cable if found to be faulty. Yes Either the wiring or the remote control is at fault. To rule out the wiring, disconnect the remote control and use a short, good jumper wire and connect directly to the remote terminal on the PCB. If the unit works using the remote, then the wiring is at fault. If the unit does not work, then the remote is at fault. Did the unit go to main burner? No Replace the Printed Circuit Board Remove remote control wires from wiring terminal on the PCB. Plug unit in and open a hot water source.

Dec 16, 2016 | Rheem Water Heaters

Tip

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

I have c7 code


it is a communication problem between remote control and tankless unit

Temporary fix:
1 Turn off electricity to tankless and remove cover. Find two terminals that remote control connects to.
2 Disconnect remote control wiring. Turn electricity back ON.
3 Open hot water tap and see if unit works as expected.
4 Without remote, tankless will heat water to default 120 degrees F and will run without the remote.
Contact Rheem they may send you another pcb board.

Nov 11, 2013 | Rheem Paloma Tankless Water Heaters...

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

My paloma tankless gas has a error code c2 11 c4 12 why


Open following link for useful troubleshooting information:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error code 11 is 'No ignition'
http://waterheatertimer.org/pdf/Paloma-Tankless-Error-Codes.pdf

Ensure you have gas to the appliance.
Ensure gas type and pressure are correct.
Bleed all air from gas lines.
Ensure gas line, meter, and regulator are sized properly.
Ensure appliance is properly grounded.
Check gas solenoid valves for open or short circuits.
Ensure igniter is operational.
Check igniter wiring harness for damage.

Error code 12 is 'Flame Failure'
Ensure you have gas to the appliance.
Ensure gas type and pressure are correct.
Bleed all air from gas lines.
Ensure flame rod wire is connected.
Check flame rod for carbon build-up.
Ensure gas line, meter, and regulator are sized properly.
Ensure appliance is properly grounded.
Check gas solenoid valves for open or short circuits.
Check power supply for loose connections.
Check power supply for proper voltage and voltage drops.
Disconnect remote control.
Disconnect and re-connect all wiring harnesses on unit and PC board.
Ensure proper venting material was installed.
Ensure condensation collar was installed properly.
Ensure maximum vertical vent length does not exceed allowable limits.
Ensure maximimum horizontal vent length does not exceed allowable limits.

Range of causes are part failure, gas pressure loss, air in gas line, improper installation of gas line or vent, 120V power to unit is disrupted or unit not grounded, circuit problems, venting problems, remote control, wiring to PC board, board failure, carbon build-up on flame rod, short circuits on gas valve solenoids.
The fact that you have error code tends to eliminate your plumbing as culprit, the error code does not mention air supply, otherwise it looks like every possible cause is on the table.

Add a comment with your experience so other with same-similar problem can benefit.

Also 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.

Mar 25, 2011 | Rheem Tankless Hot Water Heater...

1 Answer

The tank less water heater-Riannai Model#MC-91-1US-S is bleeping with an error code of 12 when the hot water is turned on. I have checked the breaks but else can I do?


Correct me if I am wrong but you have and error code 12 immeadiately you turn the tap on.
If so you have a short circuit on the low voltage side of the system. Usually this is somewhere on the wiring to your remote control pads. Easy way to test is to turn the power off, that is unplug the power lead to the heater. Take the cover off the front of the heater. Locate where the leads that supply the controllers conect in to the heater. Older models this will be on the circuit board, newer ones right at the base of the casing. You need to disconnect this wring (not the main power supply lead). Once done put the case back on and give the heater a try. If the problem is gone you have a short circuit on the wiring to controllers or a fauly controller. If the fault remains you have a short circuit on the low voltage side inside the heater. Likely need a technican to find this but tell himto start with the wiring to the the overheat thermal fuse that goes around the heat exchanger casing.

Aug 17, 2010 | Water Heaters

1 Answer

Model RE2424 W-Z (SP) one the 2 remote controllers is not displaying any power lights or 2 digit display. The other unit still works and the heater unit is functioning ok. Would like to get the other...


Disconnect both controllers. Put the one that works ok on the wiring supply to the one that isn't working. If it does not work you have a wiring problem. If it does work then the controller is faulty. This wiring is 12volt low amps by the way. When connecting the wiring can go either way on to the back of the controller. Don't let the two wires touch if the power is on to the heater, this can blow the circuit board on some older models.

Aug 05, 2010 | Rinnai Digital Remote Water Heater Control...

2 Answers

I am having the same problem as posted by jek01 on Aug 1, my Rheem Tankless Hot Water Heater is not powering off, after two years of use with no issues. I also have to turn the breaker off and wait a short...


Remove power source from the unit. If remote control2.gif 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 support2.gif.

If this helps, please indicate so.
Mike
jzklipper@aol.com

Oct 11, 2009 | Rheem Tankless Hot Water Heater...

3 Answers

Error code 76 C4 heater shuts off every 5 mins while in shower


Remove power source from the unit. If remote control2.gif 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 support2.gif.

If this helps, please indicate so.
Mike//
jzklipper@aol.com

Oct 01, 2009 | Rheem RTG-53PVN Indoor Natural Gas...

11 Answers

Paloma tankless, gas, water heater, error code C7 76


If you look on the left hand side of the burner control module you'll see 4 capacitors - the capacitors have most likely failed...pretty sure anything code 76 is P/S failure. It may also be covered for manufactures defects. If the cap is blown..the top will be slightly raised as apposed to flat like the other nearby caps - they are called top blow capacitors...the damage should be evident.

Jul 24, 2009 | Rheem Paloma PTG-74PVN / RTG-74PVN...

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