No matter what kind of furnace you have, it can malfunction when you least expect it. Long, cold winters can be hard on a furnace when it has to run all day. If your furnace is old, it may start to develop problems. One thing that can happen is your furnace makes unusual noises. You shouldn't ignore odd noises because they could mean your furnace will break down soon if you don't schedule repairs. Here are some reasons a furnace makes odd noises.
Blower Problems Can Cause A Scraping Noise
If you hear the sound of metal scraping metal or metal banging against metal when your furnace is running, the problem could be the blower fan. A blade could be scraping against the cage, or another part might be loose and banging against the blower. This could be a serious problem that needs prompt repairs. Metal hitting metal is not a good sound to hear, and it often indicates a part is loose or broken inside the furnace.
Loose Screws Can Cause Rattles
Rattling noises often indicate a panel on the furnace is vibrating because a screw is loose. Loose screws inside the furnace can also cause this problem, so a technician should take a look inside the furnace to track down the source of the noise. A more serious form of damage that can cause rattling is when the furnace cracks inside. This can be a serious problem that needs immediate repairs. While rattling seems like a minor annoyance, if it's caused by a crack in the right place, carbon monoxide can leak and pose a danger to your home.
Worn Out Belts Cause A Squealing Noise
A worn out belt makes a loud squealing noise as it gets thinner and slips against metal. If you hear the distinctive sound of a worn belt, then you should call for service right away because if the belt breaks, then your furnace won't keep your home warm. You might detect other kinds of squealing noises coming from your furnace, and these might signal worn bearings in the blower motor. A similar squealing or whistling noise can be heard when your furnace filter is coated in dust. The furnace pulls air through any opening it can when the filter is clogged over, and that can create a variety of high-pitched sounds.
Since you live with your heating system every day, you know how it normally sounds and functions. When you hear unusual noises that you can't fix by tightening a screw on an outer panel or replacing the filter, then you should call an HVAC technician for an inspection and repairs rather than put if off or your furnace might break down at the most inconvenient time. For more information, contact a local heating company like Aggressive Mechanical Contractors, Inc.