Why Your Furnace Is Making Loud Noises
1 Furnace making whistling noise
If you notice some whistling noise coming from your furnace, the duct may be the problem. The cause of this is normally a leakage in the duct. While you may need need a professional for this, you can trace the whistling noise yourself by keenly listening to where the noise is coming from. Most of the time, the noise originates from a tiny hole located close to the connecting point between the duct and the furnace. When air passes through the tiny hole, the whistling sound starts. Your filter may be clogged with dirt and replacing it can stop the noise.
2 Furnace making rattling noise
Suppose you notice your furnace making loud rattling/vibrating noises. What could this mean? Well, this problem can be easily fixed and it normally means something is not fixed in place inside the furnace. The furnace is normally enclosed by certain metal panels and when the screws enclosing the panels are loose, a rattling noise is produced. To solve this, use a screw driver to tighten the screws and if the rattling continues, this could mean another unseen part inside the furnace is loose and calling a professional can greatly save you.
3 Furnace making banging noise
What if your furnace makes loud bang? Banging noises may be noticed when your furnace blower motor makes noises when starting. This could be caused by either a problem with ignition or contraction and expansion of metal ducts. If your furnace makes loud bang, it could be a major problem and it’s advisable to turn off your furnace and immediately call a HVAC specialist just to be safe.