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

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

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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...

Posted on Nov 25, 2009

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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 is error code 76.

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 what you can glean from service technician who visits your house.

Posted on Apr 10, 2011

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My rheem 40 gallon gas residential water heater turn off n i smelled gas i relite the heater n its red light is flashing 7 times slowly but it is on now


Seven (7) blinks every three (3) seconds
Combination Gas Control failure Contact a qualified service technician.

Nov 21, 2016 | Rheem Water Heaters

1 Answer

Rheem/Ecosense, ECO-180DVP, tankless water heater,flashing code 11


Unknown if this is new installation.
New installation, you may need more gas to the unit.
Call the propane dealer.
The dip switches for selecting LP or NG may be set incorrectly.

If this installation worked before and stopped working:
Before calling service technician, copy following link for troubleshooting resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error code 11 is ignition failure.
Keeping up with regular maintenance can eliminate a lot of common error codes, but the cost is greater than expected savings from owning a tankless.
Regular maintenance such as cleaning combustion parts, checking gas pressure, testing solenoid gas valve, sanding carbon off the igniter, checking igniter wiring harness, etc.

Aug 21, 2012 | Water Heaters

1 Answer

Rheem model 41vrp40n flashes twice and stops working


Error code means that you have electronic gas control valve.

Copy following link to identify gas control valve, read error code meanings for each, and download service manual relevant to each gas control, but not specifically Rheem since rheem does not post service manuals.
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent

The fact that water heater restarts, means that water heater is getting gas, getting sufficient air for combustion, thermister is ok, gas pressure is good, etc.
The fact that you unplug and replug water heater and it works, shows that you have power vent model.
Since water heater worked correctly before, 2 flashes with Rheem power vent model could mean that pressure switch has failed.

Jul 29, 2012 | Water Heaters

1 Answer

Detecting gas and won't light


Open following link for troubleshoot error codes showing 7 flashes on Honeywell gas control valve is system lockout due to flammable vapor:
http://waterheatertimer.org/pdf/Honeywell-gas-control_error-Damper-series.pdf
The FV system in Rheem can be tripped by presence of flammable vapors such as gasoline or paint fumes etc, or it can be tripped if water heater was dropped, or mis-manufactured, or if gas control valve is defective, or if water heater is not getting adequate fresh air, or there is inadequate venting of combustion by-product.
When combustion chamber overheats, then glass vial breaks and damper shuts off air supply to water heater and it will not light.
Open following link for possible help fixing the problem:
http://waterheatertimer.org/How-to-repair-Rheem-FVIR.html

Jun 13, 2012 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Code 991 continues to show.. will not clear... how do we clear that code???


to clear the 991 Takagi code, simultaneously press the bottom 2 grey buttons of the four just to the left of the flashing LED light. When the LED stops flashing, release and then press the reset button on the black panel about 8 inches above that

Jan 17, 2011 | RTO Takagi T-M1 Mobius Gas Tankless Water...

1 Answer

I have a Nortitz natural gas water heater, model #N-063s-1. Acouple of days ago it stopped heating the water. what can I do myself to fix this matter. Thanks, lynnatheana@hotmail.com


There are many reasons a tankless heater will stop heating water. The first thing I would look for is a flashing red light on the burner indicator. The flash break down goes as follows

continuous blinking - typically means ignition failure or the unit is overheating; look for visible water inside the unit, have your gas pressure checked, or check the flame rod/igniter for buildup of debris

three blinks - typically indicates 16 error code; typically resolved by performing a descale

4 or 5 blinks - exotic error codes; for these you should definitely contact Noritz tech support

If there is no flashing light, first check your filter for debris. If the filter is clean, your flow sensor is probably stuck. Again I'd recommend contacting Noritz tech support to help you clean the flow sensor.

Jul 31, 2010 | Noritz 6.3 Gallon Residential Tankless...

1 Answer

This things beeping and flashing 12 everytime we


check the error codes on it by pressing the on off button for 2 seconds then while holding the on/off button press the up button this should display the last 9 error codes let me know what they are

Jul 28, 2009 | Rinnai Water Heaters

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...

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