Question about Honeywell Wv4460e 1016 Nat Gas Water Heater Temperature Control Valve

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Flamable vapour sensor locked - Honeywell Wv4460e 1016 Nat Gas Water Heater Temperature Control Valve

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Copy following links for troubleshoot by type of gas control valve: Always include brand and age of water heater when posting question.

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Posted on Aug 01, 2013


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Reset lock out due to fvd

You can reset some models.... depending on gas control valve and FVIR design.
Some newer models you replace the sensor located on outside of tank.


If you need further help, I’m available over the phone at

Jun 04, 2014 | Rheem 40 Gallon FVR NATGAS Low WATER...

1 Answer

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

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.

May 10, 2014 | RHEEM 50 Gallon FVR NATGAS Water Heater...

1 Answer

I reinstalled my electric water heater after replacing a floor. That was four hours ago. Still no hot water and I hear water running like a washer is filling. What's wrong?

If you failed to turn off the breaker before you emptied the tank then the element had no water to cool it. It would have blown a hole in it. If it is ok by some miracle then try turning off the breaker and turning it on again. As for the sound it would only do that if there was a large vapour lock.

Nov 23, 2013 | RTO Atwood DSI-RV Water Heater-6 Gallon

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:

If you need further help, I’m available over the phone at

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

1 Answer

No hot water, unit will not fire,

It sounds like the Flame vapour sensor has tripped. Have you been painting in the basement recently or have and pait thiner, bleach or any other flamable material in the same room?

You will have to air out the room for at leaset 24hrs to get the fumes out and then try reseting the tank. If this doesn't work you need to call in a service technition to reset the FVIR sensor

Jul 02, 2010 | Rheem 40 Gallon FVR NATGAS Low WATER...

1 Answer

Worcester combi gas boiler 3.5 highflow is constantantly dripping water at the external flue position over flow pipe

water vapour is one the main products of combustion of gas. With a standard efficiency boiler, upon initial heat up when the flue is cold this vapour can condensate on the inner wall of the flue but should stop once the flue heats up, to stop this condense dripping back on to the heat exchanger the flue should be tilted towards the outlet and thus on initial heat up water can drip from the flue. with high efficiency (condensing) boilers, condensation will occur in the flue and secondary heat exchanger during normal operation, dispense of this condensate is accommodated for in the boiler and therefor the flue should be tilted towards the boiler, if not the flue will drip constantly.

Apr 06, 2010 | 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...

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