I recently converted my furnace from l.p. gas to natural gas. It's been maybe two weeks of me troubleshooting and replacing. I have a new gas valve and transformer in the furnace. There is 24v running to the valve and it clicks to open but no gas comes out. I have exhausted all my options with the mechanical/electrical components on the furnace. I have bled the valve to be sure that there was gas making it to the inlet side. Does anyone have an idea as to why the valve stopped opening once I converted it over?
may sound like a stupid answer but there is an arrow on the bottom of the gas valve and i have seen them put in backwards,or it sez inlet on 1 end,,make sure the knob is turned to on,make sure the arrow is pointing towards the burners
I don't know if this will help without seeing your furnace but this is similar to what happened when I light ours in the fall.Where the pilot light is if you have one there is a wire sensor and that gets dirty sometimes and needs cleaned at the tip by the pilot,on ours it connects to the gas valve and signals it to open.Good luck to you hope this helps,it also could be a bad valve.
I realize this is probably a dumb question, but it has to be asked, just so everyone else won't have to wonder. Are you dead sure you put the valve on in the right direction? I'm not a certified furnace installer or repair person, so I don't actually know if it's even possible to put a valve on backwards, so, the question. It certainly sounds like you've done everything that could be done, other than to take the valve off and try getting it to open while it's off. If it's opening, it should do it on a bench, with 24 volts going to it. You may have to take the transformer with it to be sure, and actually look up in the holes to see if you can spot the flap opening up for the gas to flow. You haven't mentioned a pilot at all, so I have to wonder if this is an igniter type system? That would be my methodology of checking the valve and the transformer. If you can get it to open on the bench, then it certainly should open in place.
