Why your furnace makes a loud bang when it turns on
If your furnace makes a loud bang when it turns on, you most likely jumped right out of your skin the first time it happened. It's a startling sound, usually described as a loud "boom" or a "crack" that echoes through the vents, and it's definitely not something you should disregard. While some house sounds are just part associated with the charm of an older home, a furnace that seems like a gunshot is generally trying to tell you that something is wrong under the hood. ...