Strange HVAC noises like grinding, screeching, or booming usually signal fan, belt, or ignition problems

https://kameronregw146.cavandoragh.org/when-a-furnace-smell-is-normal-and-when-it-s-not

Strange HVAC noises like grinding, screeching, or booming usually signal fan, belt, or ignition problems. Shut it down and call right away to avoid motor failures and costly mid-season breakdowns.