• Gas Valve Picture

I have a Rheem HWH with an inducer mounted on top. The Natural Gas valve is a Honeywell and I am getting 7 flashes on the LED which is a 'FVS Lockout'. The model number is 43VP50E2. The unit is only 6 months old and was originally installed at another location. It worker at the first house but has never worked at the second house.

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The pilot and blower used to come on at the second house but nothing goes on any more. How does the FVS get reset on this unit with the Honeywell valve? I have already tried what it says in the 'manual'. I just replaced the FVS with a NEW ONE. Same problem. Hi, I need to look at the manual but possibly you can tell me what the manual says?

Typically they require you to perform several functions to reset this. Example: The AO smith units you need to power off, and hold the two temp buttons with in 10 seconds of turning the unit back on. Then when the light starts flashing, release then press both buttons again until the light is solid. Then the gas valve resets. Did you paint or something near the water heater. This is the common cause.

People varnish or paint and the sensor trips. It will continue to trip until the vapors clear. I am NOT the home owner but I was told that the lady did use 'powerful' cleaning stuff like Clorox and cleaners in the basement trying to get rid of the mold. Also I was told that there was an oil smell, probably from the oil tank or the oil-fired boiler for quite some time. I did not do the installations on any of the equipment. Truthfully, this is the very first unit with a FVS that I have ever seen.

The on-line manual basically says to shut off the power for a few seconds and to power it back up. If the error code continues to replace the sensor-which is what I did. The home owner does NOT have the original manual so I had to look it up on-line. Any help would be greatly appreciated. (The on-line manuals available give quite a bit of help for the White-Rogers valve but not for the same heater using Honeywell controls.). Line 17 here. Can the thermal release device be replaced or reset?

If the unit trips the thermal release device for any reason we want to be aware of it. It means combustion chamber temperatures exceeded what we consider to be normal. The water heater must be replaced. Now we need to find out if this is a seperate item from the sensor itself. Meaning does the vapor sensor trip this device?

I say this because from what I read the door that closes activates on high combustion temps. A glass viale breaks and shuts the door. The vapor sensor when tripped should shut down the gas valve but it should be resettable. So as long as that door is still open you should be able to reset. I am still looking around. OK found this.

You can reset the control by unplugging the blower during start up, leave unplugged for at least 5 seconds, plug back in and within 30 seconds cycle temp control from hot to low 6 times. This is all I got. Like I said every gas valve has a reset procedure. The trick is finding what it is.

I was AO smith rep so I know that code. The reason they dont tell you is because they charge like $200 plus just to perform a reset.

Well Rheem is off my list. I also read Bradford white HWH have this technology also. I will stick with the AO smith units.

They dont have the door, Its a resettable button. And the reset for the AO smiths is described in my previous post.

If it works I want to add to my documents. Post # 2 is the reset for the state with the intellivent control.

You may need a new sensor since it got wet. You can try disconnecting it and let it air out. The sensors usually get tested with a multimeter. I used to take them outside in the sun for awhile.

Swing it around in the air???? But you should call AO smith and find the rep in your area.

They may replace the part and reset for you under warranty, even though it was under water. I used to do anywork under warranty even if it was not a defect. As long as the S/N was right AO smith paid me $150 for 2 hours. 2 hours is the average time to fix any part of a water heater under warranty.

But then again I know the old corderite disk FVIR water heaters had to be replaced if under water. Input your info here. Click on water heater info at to of page when it opens.

I have Rheem AP15712A thermostat. I got Flammable vapor lockout and vented FV part for hours.

I tested its resistance and it was 80K ohms-right in proper range of 70,000 to 1,700,000 ohm). I knew the unit needed a reset. As you can see from the picture there is no reset button, no left/right buttons, just on/off switch and temp dial. I scoured the internet for reset procedure, and this was the only thread I found! Of course manual said nothing about resetting.

Thank you to lawrosa!!: 'you can reset the control by unplugging the blower during start up, leave unplugged for at least 5 seconds, plug back in and within 30 seconds cycle temp control from hot to low 6 times.' Although my unit has no blower (just exhaust flue), this was enough of a hint for me to figure out reset: Switch Off.

(probably within 30 seconds of doing that you need to do following): I cycled temp from Full Hot to cold. It was around the 4th or 5th cycle of turning temp dial to Hot/Cold that it reset. I spent 6-8 hours today testing resistance of the FV sensor with my multimeter, output voltages of thermostat, and various other things. And the solution took 5 seconds!

Thanks lawrosa!!! Even though this isn't exactly for my product you saved me $200+.not to mention several days of increasingly potent body odor!

Different companies use different gas valves. So you'll need to find out which gas valve is on your heater. This product says 'Rheem' but it's actually for a Honeywell type gas valve. I used it on a Whirlpool from Lowes and that was years ago. So, to answer your question, it might; but find the make and model of you ga Different companies use different gas valves. So you'll need to find out which gas valve is on your heater. This product says 'Rheem' but it's actually for a Honeywell type gas valve.

I used it on a Whirlpool from Lowes and that was years ago. So, to answer your question, it might; but find the make and model of you gas control valve and go from there. (Also, there's a weird reset trick to some of these, it's not just 'Plug and go'.) Different companies use different gas valves. So you'll need to find out which gas valve is on your heater.

This product says 'Rheem' but it's actually for a Honeywell type gas valve. I used it on a Whirlpool from Lowes and that was years ago. So, to answer your question, it might; but find the make and model of you gas control valve and go from there. (Also, there's a weird reset trick to some of these, it's not just 'Plug and go'.) August 17, 2017.

I have installed many of these sensors properly. Also try resetting the hot water honeywell control unit. It is possible that the vapor sensor tripped and 95% of the time resetting the honeywell control works. Is this a new hot water heater just installed?

If not try to Reset the control unit by 1. Unplug HW heater fr I have installed many of these sensors properly. Also try resetting the hot water honeywell control unit.

It is possible that the vapor sensor tripped and 95% of the time resetting the honeywell control works. Is this a new hot water heater just installed? If not try to Reset the control unit by 1. Unplug HW heater from outlet 2. Wait 5 minutes 3. Turn honeywell control to low and switch off. Wait 5 minutes 5.

Plug back HW heater 6. Turn switch to on the Honeywell control unit 7.

Then QUICKLY turn the round temp knob from low to B point. Back and forth at least seven times and the unit should start. Repeat if it doesnt start. I have installed many of these sensors properly.

Also try resetting the hot water honeywell control unit. It is possible that the vapor sensor tripped and 95% of the time resetting the honeywell control works. Is this a new hot water heater just installed? If not try to Reset the control unit by 1. Unplug HW heater from outlet 2.

Wait 5 minutes 3. Turn honeywell control to low and switch off. Wait 5 minutes 5. Plug back HW heater 6. Turn switch to on the Honeywell control unit 7. Then QUICKLY turn the round temp knob from low to B point. Back and forth at least seven times and the unit should start.

Gas Valve Picture

Repeat if it doesnt start. Service manual 115 johnson. July 5, 2017.