Question about RHEEM 50 Gallon FVR NATGAS Water Heater 6YR 42V50S40F

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50 gallon **** power vent LP with flammable vapor sensor problems can you bypassing

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You can't bypass a flammable vapour sensor. it works on resistance not continuity. You can try moving the sensor outside for a while and it may reset itself...meaning that the resistance may fall back within range. You are best to have the sensor replaced by a qualified technician who can also verify that you do not have an underlying issue such as a gas leak which is causing the sensor to trip.

Posted on May 13, 2014

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SOURCE: ECO failure. Replaced the gas control thermostat & vapor sensor

It sounds like your gas/air mixture needs to be adjusted. The flame should have just the slightest amount of white, at the very tip. The rest should be evenly blue. There is an air vent adjustment in the line to the burner, right after the gas input.

Posted on Sep 03, 2009

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1 Answer

Rheem water heater flashes seven times ,it is in lock out mode


You have Honeywell electronic gas control valve, and error code is 7 flashes.
Probably you have power vent model.
One manual from different company says: "Reset gas control using on-off button on front of control, replace flammable vapor sensor, replace gas control thermostat.
But with Rheem you also need specific steps: Remove gas burner and look for broken glass vial, and then blow out arrestor screen air intake using compressed air, clean burner parts, check for unobstructed venting, you will need new glass vial from Rheem depending on year and model number of water heater that appears on label on side of unit, or they may not have a repair kit for that model, and you might need a new gas control valve depending on model and how extensive problem was
You have Rheem water heater.http://waterheatertimer.org/How-to-repair-Rheem-FVIR.html
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent
http://waterheatertimer.org/How-to-replace-thermocouple.html

Sep 28, 2012 | Rheem 50 Gallon FVR NATGAS Water Heater...

1 Answer

My water heater say i have flammable vapors present and is locked out how can i reset it or fix it there are no vapors present


Contact Rheem
http://www.rheem.com/Contact.aspx
1 800 432 8373
Locate product information on label on side of tank.

Typical manuals say if lockout occurs, then refer to gas valve codes and/or troubleshoot section:
http://globalimageserver.com/fetchDocument.aspx?id=a92c7d0e-8a95-48ba-8810-cd714f33d47a
http://globalimageserver.com/fetchDocument.aspx?id=80b1d50e-695f-49ac-9aae-3e9489ef1e5a

For example the manual says:
1. Verify no gasoline or flammable
vapors are present
2. Reset control using ON/OFF switch
on the gas control valve
3. Replace the flammable vapor sensor
http://waterheatertimer.org/images/Wiper-FVSensor-100.jpg
http://waterheatertimer.org/pdf/Rheem-Parts-Guide.pdf
http://waterheatertimer.org/pdf/Rheem-parts-list.pdf

Aug 11, 2011 | Rheem 50 Gallon FVR NATGAS Water Heater...

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
http://www.hotwater.com/lit/im/r-gas.html

GPVH series manual
http://www.hotwater.com/lit/im/res_gas/315465-000.pdf
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
http://www.thetankatwaterheaterrescue.com/forums/forum3/2679.html
http://411plumb.com/bradford-white-defender-water-heater-review
Bradford White Defender FVIR is resettable without buying parts.
324e006.jpg

Oct 24, 2010 | Water Heaters

1 Answer

Flammable sensor is lit and won't go off. I replaced the sensor how do i reset the controller?


Certain 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. I'm not sure what control your unit has, but on a White Rodgers here's how it goes.


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

Oct 15, 2010 | Audiovox Richmond 6G40-36F 6-Year Tall Gas...

1 Answer

Rheem 21VP50-1. On hot water for 3 days. Shut of and turned on power...no ignition, no blower, no clicking.


Unplug the power supply for 10 minutes and plug it back in. If the standard start up does not occur, you have bad control valve or the Flammable Vapor Censer has trip the unit. In either case you need to contact Rheem for repair parts or a new heater.

Sep 07, 2010 | Rheem 50 Gallon FVR NATGAS Water Heater...

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

1 Answer

We have a Rheem powervent gas water heater (50 gallon). We can't seem to get the pilot light lit, it won't light at all. The Flammable vapor sensor code flashed. We had a fire in the basement but the tank...


yep, for certain it is the vapour sensor tripped by the paint fumes. I work in the hvac field, on service and at least half a dozen times a year, i go to no hot water calls, due to the sensor being tripped off by kitty litter. the sensor is designed to be as failsafe as possible. Any slight detection of vapor, that could potentially be combustible and the ignition sequence is locked.

Mar 14, 2010 | Rheem 50 Gallon FVR NATGAS Water Heater...

1 Answer

What resistence does Flammable Vapor Sensor need to have to be considered good?


13 to 25 k ohms. Outside this range sensor is bad or has had contact with a flammable vapour or other non flammable chemicals.

Oct 28, 2009 | Water RHEEM 40 Gallon FVR PROP PWR Heater...

1 Answer

ECO failure. Replaced the gas control thermostat & vapor sensor


It sounds like your gas/air mixture needs to be adjusted. The flame should have just the slightest amount of white, at the very tip. The rest should be evenly blue. There is an air vent adjustment in the line to the burner, right after the gas input.

Sep 03, 2009 | Rheem 40 Gallon FVR NATGAS Low WATER...

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