That loud bang when your furnace kicks on isn't normal, and it's not something you should ignore. Most people hear it and figure it's just an old system settling in, but that noise usually means something's wrong with the ignition process. When gas builds up before igniting, you get a small explosion instead of a smooth start. It's called delayed ignition, and it can crack your heat exchanger over time. If you're hearing this regularly, it's worth calling a Furnace Repair Service White City OR to check it out. Sometimes it's just a dirty burner, but other times you need AC Installation Service near me because the whole system is shot. 541 Cooling and Heating LLC : https://www.google.com/maps?cid=11754017492209551362 Read more : https://socialytime.com/blogs/118573/Why-Your-Furnace-Makes-That-Banging-Noise-Every-Time-It