Did your furnace pilot light go out? A pilot can extinguish or go out due to a strong draft, of unexpected wind,a dirty orifice or possible dirt in the gas tube.
The burner in your gas furnace is ignited either by electronic ignition as found in most new, modern furnaces or with a pilot flame common in older style furnaces. The gas furnace standing pilot is sometimes referred to as a pilot light, and should be lit all the time. Its purpose is to serve as a small ignition flame for the gas burner. And when this little flame fails to operate properly or it goes out, it’s one of the most common reasons a gas furnace will fail to operate properly.
This standing pilot flame can make or break your furnace’s operation, so it’s worth spending some time to learn how it works and how to troubleshoot the furnace pilot.