Question about Rheem 50 Gallon FVR NATGAS Water Heater 6YR 22V50F1

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I've a RHGPR050-40F natural gas heater. It's been intalled for about 11 months. Since about a month ago, I've had to increase the temp on the control knob a little bit every so often to keep the heated temp at about 120°F. I drained the tank in case there was sediment; there was very little and it made no difference. Any ideas as to what may be the problem? Thanks in advance. Gerry

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The thermostat prob that protrudes into the tank from the main control valve can cake with a layer of sediment.

Posted on Aug 26, 2010

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I have a paloma tankless water heater ptg-74pvn-2 that gives me the error code c2 11. looks like everybody has a problem with this. what can i do to fix it, surely enough they should have some easy way of...


Easy solutions for C2 11:

Rheem is one of the big manufacturers but has disproportionate number of questions at fixya since they try to funnel problems through service techs instead of posting do-it-yourself service bulletins. People want do-it-yourself service bulletins, as appear on the Bosch site for their products. Easy-fix in this sense would be to buy Bosch, and read service manuals aforehand to see if you have testing skills and equipment to maintain and repair tankless water heater.

Easy solution for C2 11 Rheem problem is don't install gas tankless water heater, since all costs are energy and tankless are expensive to install, maintain, repair, and replace for the mere savings of 1-8 per month.

Third solution for C2 11 no-ignition is to clean burner and combustion parts, and sand carbon off the igniter, on a yearly basis, as recommended in manual.

Fourth solution is to call a qualified service technician each year as recommended in manual, and have technician fix problem and catch water heater up on recommended service. This person can check other causes for C2 11 such as bad igniter, bad gas solenoid, low gas pressure, air in gas line, improper unit grounding, bad wiring, bad sensors, etc.
This check-up can also make sure vent drain is working properly and that acidic water vapor and other resulting combustion by-product are going into the household drain and eventually out to sea instead of dripping down into the heat exchanger causing rust and premature failure of exchanger.

Next solution will not solve C2 11 error code, but can address other error codes before they happen: Maintain water heater on yearly and monthly basis as recommended in manual. This is good for folks who like projects.
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf

More resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
1-800-432-8373
http://waterheatertimer.org/How-to-install-gas-water-heater.html

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

2 Answers

Replaced mother board due to error code c2 11 as per rheem tech department. now code 11 flashes after 3 to 4 minutes of use and unit shuts off. WHAT NOW????


Rheem, Richmond, Ruud, and Paloma are all the same manufacturer. After about 9 months, my tankless RTG-74PVN started giving me error code 11 and cold water!. I fixed it by cleaning the burner, as shown in this video:
www.howtolou.com/clean-a-burner

Dec 29, 2010 | Rheem Paloma PTG-74PVN / RTG-74PVN...

2 Answers

Heater does not function when C8 code appears. How fix?


This is a circuit board problem you will need to contact rheem

Aug 10, 2010 | Rheem RTG-74PVN-2 Natural Gas Pronto Whole...

1 Answer

Water not hot enough


Often this is a problem of gas piping. It is likely too small. The pipe should be 5/8" copper or larger, or 1/2" Black iron or larger. The gas regulator (if it is LP) will need to be turned up from 9 inches water column to 11 inches water column when all gas appliances are operating.

Apr 01, 2010 | Bosch AquaStar Indoor Natural Gas Tankless...

1 Answer

My water heater cuts of after 30 seconds and shows C2, 11 code


sounds like your gas lines are too small or not enough pressure... or you may have to clean the rods

Jan 13, 2010 | Rheem Paloma PTG-74PVN / RTG-74PVN...

2 Answers

Problem for Rheem Paloma PTG-74PVN / RTG-74PVN Natural Gas Indoor... What does C2 11 error code mean on my Paloma


hi pete here ill try and help this could be 2 things check the sensor on the unit the outher one is a qustion has the gas company changed your meter latley and turned off you gas and not come back to light your poilet because this code also means not enough gas or wrong type of gas

Nov 18, 2009 | Rheem Paloma PTG-74PVN / RTG-74PVN...

2 Answers

My new tankless WH stopped working. It gives hot water for about 15 sec, then starts flashing C7 12 or C2 11. How can I fix this, We had it for a month now & it worked before.


11 The Gas Shutoff Valve is not opened
completely.

12 Gas Service has been interrupted.
LP Gas is running low. (LP models only)

I think C7 is where the startup sequence ended...and then you get the error code

If less than a month old...contact your customer support

Nov 01, 2009 | Rheem EcoSense by 7.4 GPM Outdoor...

1 Answer

I had our 1600ng Bosch water heater installed a month ago during warmer weather. It is not providing very hot showers. I use all hot no cold. how can io get more heat


on the front of the water heater down at the bottom there is a thermostat (usualy a blue knob) turning it clockwise will increase the tempature of your water
(good Luck)

Oct 12, 2009 | Bosch 1600H-NG Natural Gas AquaStar...

1 Answer

The max temp in the control is 120F. How can I


gas pressure may be increased but most boilers are designed to a limited output 24 28 30 etc

Oct 08, 2009 | Rheem EcoSense by 7.4 GPM Outdoor...

1 Answer

Seven months ago, a bosch alled at my house


you will always have this problem in city type of appltcations.there is too much of a flow differation.

Jul 13, 2009 | Bosch 2700ES Natural Gas AquaStar ...

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