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

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Rheem 50 Gal Hot Water Heater will not stay lit

My Rheem 50 Gal Hot water Heater will not stay lit unless it is in the hottest position. I changed the thermo -couple to no avail. If I put it in a lower postion the flame comes on for 20 seconds, makes a click and shuts off.

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  • Anonymous Feb 15, 2009

    My pilot light will light when it is in the pilot position. As soon as you turn it to on it goes out. Have replaced the gas valve and thermocouple. Seems like something is blocked or plugged but cannot figure out what. Do you have any ideas?

  • Anonymous Apr 01, 2014

    where do i return my rheem hot water heater to if i have a warranty issue for

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On the back of the gas valve (where you turn the temp up) there is a stem that actually goes into the tank that senses the temprature of the water it could be dirty or buried in sediment depending on how old the tank is, or just bad. if the tank is over 10 years old i wouldn't bother replacing the gas valve, the tank is probably not far behind. A new valve will run around $100.00 maybe a little less. You wont find it at menards or home depot in stock but they may be able to order it for you. Menards sells rheem products or try you local plumbing supply house. REMEMBER TO RELIEVE THE PRESSURE ON THE TANK BEFORE YOU WORK ON IT. IF YOU CHANGE THE VALVE DRAIN IT FIRST!

Posted on Feb 10, 2009

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Rheem 22V50F1 pilot won't stay lit. Changed thermo couple & it lit, ran then went out. Let it sit overnight & it lit, ran then went out. What next? p.s. The unit is 5 years old. Thanks


If pilot lights and flame is robust and clear blue, and pilot goes out later, then some suspects can be excluded: air in gas line, low gas pressure, thermocouple is overtightened (finger-tight + 1/4 turn), thermocouple not positioned correctly in the flame, dirty pilot tube.
If flame is yellowish and small: then clean pilot tube and combustion parts.
http://waterheatertimer.org/How-to-install-gas-water-heater.html#clean
Remaining suspects can include: air in gas line, low gas pressure, bad gas control valve, tight house so household vent fans pull air down water heater vent that blows out pilot, hot attic with inadequate ventilation, water dripping down vent.

Open following links to read troubleshoot resources.
http://waterheatertimer.org/pdf/Pilot-light-will-not-stay-lit.pdf
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

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1 Answer

My rheem hot water heater wont stay lit and its brand new.


The top thermostat is kicking out and it may me a short or bad part.
New can be bad also.
I would take it back and get another unit.
Now if you wired it check your wiring and the breaker for proper voltage and amperage , wire size and so on.

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Rheem RHEEM 50 GAL ELEC TALL Water Heater 1.5 yrs old, power at the elements, new elements installed new thermostat installed, still no hot water.


Hello Check the red overtemp reset button at the temp control.Check for contintuity at the elements with a volt meter (pull one wire off first) they should have a reading otherwise they are open & shot.Last is overdrawing (busted pipe) shut off the cold water supply for a 1/2 hour and open it back up and feel the hot water supply pipe.Is it hot?The tank can't keep up with the demand.

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Water discoloration. Rhreem serial rh0909ff00279 date 9/2003 model 8v520c 50 gal electric rheemglas fury. prolem occures when we use hot water. tried fixing...backwashed, drained water out completely...


Brown discoloration is evidence of a rusting or corroded steel pipe somewhere in you plumbing system. Trace the water lines back from the faucet and replace all the steel pipe.
White discoloration is minerals that separate out when the water is heated.
You can change the Anode Rod and it should help. It is not an instant fix, the rod will take a week or two to do its job.
If your water heater is still under warranty, call Rheem, they may replace the water heater free.

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1 Answer

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the most common problem is the thermocouple being busted. If thats not the case then the gas valve may be busted but that isn't very common.

Eitherway this required the burner being taken out so I wouldn't recommend anyone to do this who isn't a proffessional.

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one element is off peak and one is boost could be thermostat or ripple controller in fuse box or one dead element

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1 Answer

I have a Rheem 50 gal. natural gas water heater mod#21V50-6A followed all instruction and can't get pilot light to stay lit.


The most common reason a pilot light will not stay lit is a bad thermocouple. How old is the water heater? If the pilot light will light, but then go out when you release the safety button, that is a sure sign the thermocouple is bad. You can buy a replacement thermocouple at your local home improvement store. There is a small chance that the control valve has gone bad, but that is highly unlikely.

Feb 23, 2010 | Rheem 50 Gallon FVR NATGAS Water Heater...

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