Have you ever hit a gas valve with a hammer to make it work?
by that very question you can guess I have, very recently! But will it last?
Oh yeah, i signed up for GSR two weeks ago and nothing... I haven't seen/heard/read one ad yet, but my money is in their account. I haven't even got a card through with my smiley little face on it yet...
Pumps get the hammer treatment, try my very best not to touch pump valves (unless gate valves) as they're bound to leak.
What's happening with it ? if a tap with a hammer fixes it - even if only for a short while, then it may just be the solenoid, replacements are cheaper than the whole valve (in some cases) and quicker to change.
It was working for a couple of hours after the aforementioned "percussive maintenance" and I return a day later for it to be back at fault code. I am getting negative pull on the burner pressure before fault code and a quick tap opens the valve. I'm concerned, as said earlier, that one time the valve will not close...
maybe look into changing the solenoid instead of the entire valve then?