Jan 30, 2009 · One more troubleshooting tip, on a residential gas furnace if a gas valve is not "clicking" meaning it's apparently not receiving 24 volts you can jump directly off of the control board using the R and the C terminals, R to one terminal on gas valve and C to the other terminal on gas valve (or wherever else you can retain 24 volts from) to the ...

Dec 3, 2014 · Gas valve was replaced because the furnace wouldn't light. With the help of others and some internet research i used a multimeter to test components that pointed to the gas valve as the culprit. Ordered a used one and the furnace worked again, but with the rollout switch/orange flame issue that i described above.

Jun 20, 2022 · Honeywell Gas Control Valve / Water Heater / "O" Flashes Indicating "Control OFF/Pilot Out" First occasion for this condition as far as I know, and wondering if a dirty burner is possible, but remembering now at this moment actually, that there is a thermocouple, so... wondering if this is similar to standing pilot gas furnace in which pilot will light, but go out not …

Feb 10, 2012 · I have read your explaination how a gas valve works and found it very enlightening. My problem is that on the BEESTON gas boiler of our communal heating system the pilot light is lost intermittantly and I am looking for reasons. After your article I am convinced it is not the gas valve! The boiler is 21 years old and BEESTON has gone out of ...

Oct 28, 2015 · You do need three wires to the valve. The common is shared; there are two solenoids, pv opens first, spark lights the gas, module detects flame then energizes mv as well. Most modern furnaces sold now have hot surface ignition which doesn't use a pilot; ignitor heats up, then power is applied to the main valve. Uses a totally different valve.-----

Oct 22, 2022 · I suspect the control board based on process of elimination. The gas valve model number is WV8840B1042. There are plenty of used gas valves on eBay, ex. WV8840B1100. Does the model number have to be an exact match to be compatible?

Nov 21, 2020 · Plumber said it's the honeywell gas control valve that needs replacement. I don't doubt him because I have 2 tanks and I had similar issues on the other tank needing gas control valve replacement as well. The bad news he wont replace it because "their policy" is they only replace control valve if tank is 6 yrs old max cuz of liability.

Nov 29, 2009 · so i think i might have this narrowed down to possibly i have a faulty control. when the furnace fails to light i have no power at all from the control to the pv at the gas valve. if i shake the orange wire (pv) at the control the valve clicks on i have 24 v and the pilot lights . i have tried several times to clean and tighten the connection ...

Dec 5, 2011 · put one of the leads on MV (main valve ) and the other on MV/PV this is your common terminal. If you read 24 vac then your valve is bad.....if you read anything other then 24 vac (less) then the control is not telling the valve to open and yes it may be the flame sensor.

Dec 3, 2023 · If so that is a power vented heater. When it has the 120 volt power on then it looks like the main control has a igniter to light the pilot light. Once the pilot light is lighted it knows that with a thermocouple and then sends power to the exhaust fan. Once that fan runs it turns on the gas valve. Point is it looks like it lights the pilot by ...