furnace refuses to light
Have a new Coachmen Leprechaun-checking everything, getting ready to head to Florida-found that the furnace refuses to light. Plenty of propane in the tank, batteries charged, electric plugged in, gas...
Forum Discussion
routeforty wrote:BFL13 wrote:So possibly I'm getting gas to the igniter but it's not lighting? Would the igniters spark if there was no gas going to it?
There is a sequence to ignition. The blower gets the sail switch to close, which energizes the board, which lets the furnace purge for about 20 seconds, then the board opens the gas valve and the igniter sparks when the gas valve opens.
You are getting the sparker clicking, so there is gas to that point. Your problem must be with the gas after it gets past the gas valve, as I mentioned before. At least that is what it seems from here.
I don't know exactly if the ignitor only works if the gas valve opens first (I thought so, but the wording on that is not clear), but they both work together.
You could have gas coming past the gas valve so the igniter sparks, but the gas might not be getting to the igniter because of an obstruction in the "burner" perhaps. (wasp nest? plugged up orifice?)
