Why Your Furnace Makes a Clunking Noise When Starting
It's pretty unnerving when your furnace makes a clunking noise when starting upward, especially on the freezing winter night when you're simply trying to stay comfortable. You're sitting right now there, the thermostat keys to press, and instead associated with the gentle hum you're expecting, you hear a loud thud or a metallic clunk that sounds like something is falling apart inside the vents. While the little bit associated with noise is normal for just about any mechanical system, a definite clunk generally means something is having difficulties under the cover. ...