Question about Rheem RTG-74PVN-2 Natural Gas Pronto Whole House, Natural Gas, Tankless Wat

1 Answer

My Rheem Pronto model#RTG-74PNV-1 has powered off for some reason unknown, I turned the unit back on and it supplied hot water for approx. 10 minutes before it started flashing a code [C7]on the remote control UMC-117. Any idea what this code means. I installed this unit myself about 3-years now with no other problems. Help?

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 244 Answers

Remove power source from the unit. If remote controlMy Rheem Pronto model#RTG-74PNV-1 has powered off - 2.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 support.

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

Posted on Nov 11, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Our rheem pronto tankless rutg-74xp red light will come home indicating hot water and stay on about 2 minutes and then turns off we have turned off and back on and let water run for 5 minutes and will come...


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

List of causes MIGHT include one of following:
Bad household circuit breaker that powers electronics, or loose wire inside outlet where tankless plugs in.
Tankless fuses and control board.
Water flow rate too low. Minimum .8 gallon required (depending on model)
Tankless inlet filter clogged.
Household aerators clogged at faucets.
Crossover at single-handled faucet
If installed, there can be crossover at mixing valve.
Faulty household check valve, including check valve on re-circulation system if that system is installed.
Restriction in household water line, such as clog at elbow.
Unequal pressure in household hot and cold lines, caused by restriction in hot line. When single-handled faucet turns on, the cold water pressure is higher so hot does not flow and tankless will not turn on.
Loose wire connection inside tankless.
Unit temperature set too high.
Unit temperature set too low.
Water temperature is very hot coming out of tap, so more cold is added, but that reduces amount of hot water flow, so tankless turns off because flow rate is too low.
On some tankless, if water is preheated by solar or other indirect source, the burner will not activate.
High mineral content in water > delime tankless yearly
Misaligned temperature sensor
Low gas pressure. Wrong type of gas. Undersized gas line.
Too many faucets on at same time.
Faulty tankless water valve. Water valve stuck.
Fluctuating household water pressure, for example MUD and PUD district water pressure problems or water well pressure.
Faulty household pressure reducing/regulating valve if installed.
Faulty household pressure tank, if installed -or- pressure tank needs to be installed.

Apr 24, 2011 | Rheem RTG-74PVN-2 Natural Gas Pronto Whole...

1 Answer

Are water heater runs for about a minute then the code C7 13 Code flashes and we lose our hot water?


Call Rheem for a new unit. They problem will never be fixed. They have redesigned the unit. It is now RTG-95DVN a self contained venting unit. Mine was worked on several times over two years and much frustration before they finally replaced it.

Sep 05, 2010 | Rheem RTG-74PVN-2 Natural Gas Pronto Whole...

1 Answer

When I turn the water on its takes forever to get hot and then only stays hot for about 10 minutes. Then it gets freezing.


if the unit fire up and is hot at the point of the hot supply after 2-5 sec then there is no problem with the unit..it could be your plumbing.. usally you will get a code if there is a problem with the unit. if you do get a code note it and contact rheem..

Aug 11, 2010 | Rheem RTG-74PVN-2 Natural Gas Pronto Whole...

1 Answer

I have a Rheem tankless pronto unit. I had a


is there any type of surge portection for tankless water heaters mother boards??????

Mar 06, 2010 | Rheem Tankless Hot Water Heater...

3 Answers

Hi, I have a Rheem RTG-74PVN-2 tankless hot water heater. It has run great for about a year, but now shuts off completely after running for approx. 8-10 minutes. I have the water temp set at 130 f. Any...


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...

Nov 25, 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...

2 Answers

Rheem Pronto Hotwater Heater Error


Unplug unit from wall. Disconnect remote wires from circ board, and let unit set for about 5 minutes. plug back in. run water and see if unit comes on.

Jun 16, 2009 | Rheem RTG-74PVN-2 Natural Gas Pronto Whole...

3 Answers

Rheem Pronto RTG-74 error code C4


Error code 13 is "oxygen depletion sensor" activated.
The first number is a sequence indicator.
If you need the training manual I have it and can send it to you.
I got Rheem to send it to me a while back and it is a big help when working with these units.
It covers th RTG-42, 53, 66 and 74.

Apr 29, 2009 | Rheem Tankless Hot Water Heater...

2 Answers

How to correct error code C-7 on my RTG-74PVN Rheem Pronto


I had the same problem and called the manufacturer. The error code C-8 was followed by the number 76. They told me to disconnect the thermostat/digital display from the main unit. This was fairly simple to do by removing the front panel. The unit works steady now without shutting down after a few minutes. The help desk told me that the main circuit board needs to be replaced for the unit to work with the display and that they would mail me one asap. At least we have hot water again.

Oakville, Ontario

Jan 11, 2009 | Rheem RTG-74PVN-2 Natural Gas Pronto Whole...

1 Answer

Ideal c24


Call the manufacture at 800-432-8373. They will be able to assist you. Have your model & serial number. Parts may be under warranty.

Oct 14, 2008 | Rheem RTG-53PVN Indoor Natural Gas...

Not finding what you are looking for?
Rheem RTG-74PVN-2 Natural Gas Pronto Whole House, Natural Gas, Tankless Wat Logo

795 people viewed this question

Ask a Question

Usually answered in minutes!

Top Rheem Water Heaters Experts

Donni Steen

Level 3 Expert

659 Answers

gizmonix

Level 1 Expert

13 Answers

Brad Brown

Level 3 Expert

15557 Answers

Are you a Rheem Water Heater Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...