Question about Rheem 40 Gallon FVR NATGAS Low WATER HEATER 6YR 22V40SF

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I have a Rheen power Vent 21VP75E-1P, it ignites burnes for a few seconds it clicks and the gas shuts off. It immediately re-ignites and does the same thing repeatedly. I bypassed the vacuum switch to see if that was the problem but it acted the exact same way.

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Before calling service technician, here are links you can review Rheem and gas water heater manuals and information.
http://www.rheem.com/product.aspx?id=C24E3F52-A6A4-4BC7-AF5B-0DF23A7A0263
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

Typical power vent manual has troubleshoot steps that might or might not apply:
http://waterheatertimer.org/pdf/Rheem-ResPowerVent.pdf

Post question on pro water heater forum
http://www.thetankatwaterheaterrescue.com/forums/forum3/

Find age of water heater:
http://waterheatertimer.org/pdf/WaterHeaterSerialNumberDecoder.pdf

Identify your product:
http://waterheatertimer.org/pdf/Rheem-Gas-models.pdf

Posted on Apr 04, 2011

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I have a Rheem power vent hot water heater that goes into lockout


go to waterheaterhub.com and search for your specific model as there are more than 1 power vent unit made. I would start there before anything else.

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Rheem does not post service manuals, but other manufacturers do.
Copy following link for troubleshoot by type of gas control valve.
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent

Also, scroll up on same page, on right side for heading title 'Pressure switch' for troubleshooting the pressure switch.

Don't forget to check anode rod to protect steel tank from rusting.
http://waterheatertimer.org/Replace-anode-rod.html
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Why is it always Rheem problems?
Every water heater problem is Rheem.
And Rheem doesn't post any service manuals, like the other two big manufacturers, AO Smith-American, and Bradford White.

Copy following link for troubleshoot by gas control valve.
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent

Scroll up and find pressure switch heading among links.

You can install gas control valve yourself.
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1 Answer

Sweeting from top of heater


Water on top of gas heater can be caused by poor venting, or inadequate combustion.
Make sure water is not coming up from under tank top, indicating tank leak requiring tank replacement.
Have a plumber look at problem to make sure home is not filling with deadly, odorless CO gas.
Inspect pipes that they are not corroded and covered with condensate.
Check that roof cap is in place.
Let heater fire and burn for a few moments so the fire is going good, and then light match just outside the draft hood on top of heater. Blow out match and see if smoke draws immediately into vent and upward.
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html
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Thermocouple may need replacement.

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I have a rheem power vent 21vp75e-1 it ignites the burner for couple of seconds and shuts off and retry to ignite into a lock out I wire jump the vacuum switch and it works properly than i replace the...


Before calling service technician, read manual for troubleshooting and yearly maintenance requirements.
Open following links to identify same-similar product and download manual.
Once you have product showing on page, click 'specs-docs' tab to see use-and-care manual.
http://www.rheem.com/product.aspx?id=C24E3F52-A6A4-4BC7-AF5B-0DF23A7A0263
http://www.rheem.com/Products/tank_water_heaters/gas_water_heaters
http://globalimageserver.com/fetchDocument.aspx?id=c0471d58-5e59-4be6-96f7-68361b8fb515
Rheem site loads slow, and some manuals never load.
Typical power vent manual:
http://waterheatertimer.org/pdf/Rheem-power-vent-manual.pdf

I believe the 21VP is older and Rheem does not show older manuals, but manuals are generally generic enough to help greatly. Year of manufacture show as second and third digit of serial number.

Lockout condition requires service technician and part replacement, or call Rheem and have them send part.
I found one link that talks about FV lockout that may or may not pertain to your issue:
http://www.diychatroom.com/f7/rheem-hot-water-heater-pilot-burner-not-staying-lit-65755/

Apr 19, 2011 | Rheem 40 Gallon FVR NATGAS Low WATER...

1 Answer

The flame switch is making a clicking noise and is not igniting the burner on my rheem power vent. the glow light comes on but does not ignite the burner. how can I fix this problem


Hello,

It sounds like you either have the gas shut off, or you have a bad regulator. Make sure the gas is unrestricted.

Hope this helps

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check the thermal coupling for the pilot light. if it goes out it will shut down gas supply, its a safety feature to put out pilot light if the thermal coupling is bad. to prevent gas from leaking and causeing a fire. check coupling.

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Is the vent fan working well and can you feel unobstructed air out the termination fitting outside?

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