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It sounds like you have a faulty control module. If burners are lit and you get a faulty flame error, the module has failed.Also if the module does indeed sense there is flame present when it should not be,it should immediately cut power to the valve to shut it down.
Can you verify with a meter that we do indeed lose signal to valve? If we know we are losing power to valve then yes, sounds like valve may be sticking, but module definitely has an issue if it says we have a false flame when the burners are on and thermostat is calling for them.Now if we only get the false flame error before or after we should have flame , issue can be valve sticking.
Yeah that error when flame is on and should be is what leads me to suspect with the module.
Also looking at the wiring diagram it appears this gas valve operates on only 3 volts rather than 24 volts.
Also valve says 3v
I understand,Manufactures are often making change sand not unusual for manuals I have to be a bit different.I agree that you may have more than one issue.
1.Valve should close when voltage removed.
2.We should not get false flame when thermostat is calling for heat and we have flame.
The only test I am familiar with is checking to verify flame sensor is procuring enough micro amps to tell control that it is ok to stay on. But that would only be beneficial if we were getting an error saying flame NOT sensed.
My manual does not have an error code explanation.Do you see the error code chart on unit?If so tell me exactly what it says for flashing LEd means
I can open to other experts and see if they have more info. My understanding in the beginning was that you knew it was sensing false flame while running.
I am going to open to other experts to see if they have more concrete ideas.I could throw out a guess and say replace board or valve or both, but would be very unprofessional.Lets see if others have ideas.
I have opted out of the question to see if perhaps other experts may have more information and can assist.Please do not rate or reply as that will send question back to my desk and delay getting assistance..Please stand by to see if another expert can assist further.