[MandK]

I also experienced a furnace issue last winter, I did the trouble shooting with the help of this forum and some YouTube videos. Turned out it was the igniter. Mine would light sometimes and not other times. Once it lit, it stayed lit until the thermostat called for it to stop. But in my research, iirc, I found out that the ignitor is also a flame sensor. If the flame goes out, it shuts the gas off. So I guess that if it is not sensing the flame right after it lights, that could be another possibility. Good luck with it and keep us informed in case it’s something we haven’t heard of before.