When a gas furnace comes on, it makes a distinct whoosh sound as the electronic ignition system or standing pilot light ignites the gas jets on the burners. It’s a comforting noise that tells you the furnace is doing its job, generate heating, and the sound of the blower fan will tell you that the heat will soon move through the ventilation system to reach the rooms.
But what if the burners don’t light? This is a problem you may run across, and if the burners aren’t igniting, it will usually cause the furnace to shut down entirely as part of safety precaution built into it. Why is this happening, and what can be done about it?