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

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Same thing: FV sensor shuts down gas valv, but no vapors present.

Does any company make a water heater today that works?

I appreciate the safety comments, but this seems to be a faulty product, so do we consumers just have to keep taking it up the keester?

I like my plumber, but the solution of "buy a new heater to replace the 4 month old Rheem in your new house" makes me nuts!

Tell me if there's a good product out there, and tell me where to dump this garbage.

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Rheem makes a great heater. What happens to your heaters when they go out? Are they splitting the tank or what? Tankless water heaters are an awesome investment if you have the up front cost. If you have a power vent model they are soo touchy and trouble some. If you do have one of those power vents i would get rid of it and try and install something else!

Posted on Jul 28, 2009


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1 Answer

How to test flammable vapor sensor lockout on whirlpool gas water heatermodel nd50t122-403

You could clog up the screen on bottom of water heater... and this would cause FV system to trip because of overheated combustion chamber... then clean arrestor screen and push reset button located on front of combustion chamber to get water heater working. Of course you might have to replace parts to restore functionality.
Or pour some gasoline nearby and see if the water heater explodes, or if the FV trips. I would think this to be unwise.
Contact Whirlpool


Oct 19, 2014 | Water Heaters

1 Answer

How to reset FV sensor for water heater

Are you SURE there are no flammable vapors present now? Try removing it & taking it outdoors for half an hour - do this with the water heater POWERED OFF. Bring it back in & reconnect it, then try the water heater again. If it still won't light, replace the sensor.

Aug 10, 2014 | Water Heaters

1 Answer

Can they keatch on fire

Yes. Tankless computers that heat water can be fire hazard.
There is no combustible FV system on tankless, as you find mandated with ordinary tank-type heater. But same with your fireplace.
If flammable vapors are drawn into tankless air intake or fireplace, the flame will ignite vapors and cause fire inside home.
Always shut down tankless pilot light and burner when using WD40, lacquers, solvents, spray paint, gasoline, etc.
Do not store flammables nearby.
And do not store or use other chemicals nearby since trace amounts of many household chemicals such as bleach and pool cleaners, craft products, household cleaners, etc will enter burner and corrode parts inside tankless, severely shortening life of tankless burner and sensors.
The internal parts on tankless are un-known fire hazard, because I have not read specific reports in news.
However most companies today have absolutely locked down news stories that might affect their sales, so these incidents are no longer getting reported if they are happening. So if you voted republican or \'conservative\' in the elections, then you voted to protect companies rights to withhold vital safety issues from you until enough people get killed that someone says something without fear of losing a job. Because the rich need you to protect their right to fire you from your job so they can get more money from you. And somehow they got people to vote for this, under the guise of protecting your job. lol

Aug 16, 2013 | Bosch AquaStar Indoor Natural Gas Tankless...

1 Answer

Rheem water heater pilot lite stays lit, burner goes out

Tripped FV or TRD, or bad gas control valve, low gas pressure, air in gas line.
Unfortunately, Rheem does not post service manuals. Other companies post service manual, but only Rheem uses TRD FV system, while other companies use arrestor screen.
Add a comment and say what you discover.

May 24, 2013 | Rheem 42V75F Fury Heavy Duty Natural Gas...

1 Answer

My 50 gal lp water heater made a slight boom sound and now when i lite it and turn on the main bunner it snuffs its self out

1) Call manufacturer with model number and serial number appearing on label on side of water heater.

2) Copy following link to troubleshoot by type of gas control valve:

3) Product manuals today recommend yearly service, and yearly cleaning of combustion parts, and to keep air intake clean.
If air intake becomes clogged, or combustion parts get dirty, it can slow the exit of combustion gasses, and this will soot the burner, and clog burner ports, which means slow lazy yellow flame and incomplete burning of released gas. So unburned gas is present in combustion chamber and up the flueway. The ignition of unburned gas can cause explosion of various intensity ... and the 'boom' sound you heard.

The explosion certainly overheated combustion chamber and tripped FVIR system.

4) Since each manufacturer has different FV system (flammable vapor ignition retardation system), and each manufacturer has continued to make changes over time in FV systems, the solution for tripped FV will vary by brand and age and model of water heater.
For example the intellivent gas control can be reset in some models, while other models require replacement of parts ranging from gas control valve to FV sensor to glass vial, and include possibly full replacement of water heater.

Jan 20, 2013 | 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:
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:

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

1 Answer

Cant light pilot light

The problem can include bad thermocouple, combustion parts need cleaning, low gas pressure, air in gas line, bad gas control valve thermostat, lock-out from FV sensor flammable vapor event, ECO tripped from high heat event, hot attic air reducing available oxygen.

Before calling service technician, open following links for resources, illustrations and Reliance troubleshoot and service manual that might apply to your water heater:

Aug 09, 2011 | Reliance Water Heater #6-50-GORT 50GAL...

1 Answer

Water hearer gas valve locked out. has code #15 fv sensor. has no flammable vapors around. how do i reset?

If water heater has FV event, check your manual for re-setting procedure.
Look at label on side of tank for brand and model number of your water heater:
My understanding is that Bradford White has resettable FVIR but all other manufacturers require service technician for part replacement.

I have found one internet thread that covers do-it-yourself FV.

I also posted same question on water heater forums, and nobody will answer 'due to liability concerns.'
This leads me to believe there are serious safety issues that could lead to manufacturer and-or plumber liability since FV-lock-out mandates were written to reduce widespread insurance property and casualty losses.

Apr 19, 2011 | Water Heaters

1 Answer

I have a GPVH 40 100 AO smith hot water heater.The FV (flammable vapor) sensor has been setoff from us painting the floor yesterday. How do I reset the unit?

AO smith manuals

GPVH series manual
You can search the manual for FV

The FV sensor shorted because it detected flammable gas

Quote manual:
Flammable liquids (such as
gasoline, solvents, propane (LP or butane, etc.) and other substances
(such as adhesives, etc.) emit flammable vapors which can be ignited
by a gas water heater's hot surface igniter or main burner. The
resulting flashback and fire can cause death or serious burns to anyone
in the area. This water is equipped with a FV sensor for detecting the
presence of flammable vapors, see Figure 3. When the sensor detects
those vapors, the unit will shut down and not operate. Should this
happen, please refer to the troubleshooting guide on pages 28-30.

Troubleshoot step 14-15 says
replace the FV sensor
call tech assistance number that shows on water heater
AO Smith will refer you to a plumber
I don't believe homeowner can buy these parts due to Federal regulations
The shorted FV sensor probably saved you a flash-over
The cost of 2nd degree burns from a flash-over would be astronomical.
Fortunately you're ok, and the other folk in the room are ok.
In the old days.
Two guys I knew, winter 1978 Chicago, were laying VA tile using the black mastic.
They were killed and the house burned down because of the water heater.
Main office marked the event with a memo saying they still owed money on their account.

The only company with a re-settable FVIR that I'm aware right now is Bradford White
Bradford White Defender FVIR is resettable without buying parts.

Oct 24, 2010 | Water Heaters

2 Answers

Hosed basement floor. soaked flamable vapor sensor. Removed and dried sensor. control now in lockout. How do you get control out of lockout???

    Certain Rheem water gas water heater models feature electronic controls with a flammable vapor sensor installed on the bottom portion of the water heater unit. This sensor is designed to shut off your water heater system to prevent fires in case flammable vapors are present within the area. If your flammable vapor sensor caused your water heater to shut down, check the area immediately for leaking gas or other flammable products. Common household chemicals such as bleach can also trip the safety system as well as unsuccessful burner ignition attempts.

    White Rodgers Intelli-Vent PowerVent Control Equipped Models
  1. Step 1 Turn the water heater's blower switch off and disconnect the power cord for the water heater (refer to your particular model's operation guide for the exact location of the blower switch). Disconnect the Molex connector attached to the bottom of the control pad (the left most connector with five pins).
  2. Step 2 Turn on your multi-meter and set it to read resistance or "ohms". Connect one of the multi-meter's probes to the number two pin and the other probe to the number three pin of the Molex connector (middle black wires). If the reading on your multi-meter reads below 9k or above 45k ohms, the flammable vapor sensor is faulty and in need of replacement; you cannot reset the system until this issue is resolved.
  3. Step 3 Reconnect the Molex connector to the bottom of the control pad, reconnect the water heater's power if and turn the blower switch to the "ON" position. Press both the left and right buttons on the control pad at the same time. Wait for the green light on the control pad to blink and press the following buttons in sequence: Left, Right, Left, Left, Right, Left, Right, Right (you will need to perform these actions within 30 seconds of reconnecting the power cord to the water heater in order to be successful).

Jul 23, 2010 | Rheem Water Heaters

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