I have a gas fired forced air furnace that is about 15 years old. Last winter it wouldn’t kick on. When the repairman showed up he told me it was the rollout switch,flipped it, and sure enough my furnace kicked on. Since that time it has happened many times and the furnace always kicks back on. I know this isn’t fixing the problem but an not sure what to do. I am loathe to call a serviceman again.