I have a gas furnace with an electrical starter. Can't find a brand or model number ANYWHERE on it, so, that doesn't help (I can email a photo to anyone who'd like to take a shot). It's about 10 years old.
Tried turning it on during the first cold snap. Normally, an internal blower comes on, After about a minute, the electric heating element starts to glow, there's a click, and the burners light-up.
Now, all that is still happening -- except, the burners don't light. I'm certain the gas is on, because the line that feeds it also goes to the hot water heater, which t's off, giving each device it's own shutoff valve. I've tried both positions for the furnace valve just to be sure, but there's no difference.
There's no smell of leaking gas at all during any part of the process. While I don't know jack about heaters, it appears that the gas line passes through some sort of electronic control module, which presumably has an internal valve that allows the gas to pass to the burners. It looks to me that that module isn't functioning. It has an on/off switch on it, but playing with it hasn't changed anything. There's also a master power switch that controls power to the entire central heat/air system (including the thermostat), but, resetting that hasn't helped, either.
The thermostat APPEARS to be working properly.
Two things to consider:
1. A few weeks before then, I'd found the master power switch, and didn't know what it was. I flipped it off to find out, saw what it did, and turned it back on. It wasn't a sudden on/off cycle, so, I don't think that had anything to do with it.
2. A storm fried a transformer outside the house a few months ago, and while the power company crew was attempting to fix it, a surge passed through the house and blew up my microwave and another kitchen appliance. Everything else was fine, but, maybe that took out this module?
Any suggestions would be appreciated. I'd also like to have some idea what the repair cost would be, both do-it-yourself (if this is something an average person can do), and having someone come out.