3 Furnace Sounds That Could Mean Danger

What’s that noise, banging, rapping, scraping, or screeching? Whether the sounds are soft or loud, it’s sufficient to give anyone the jitters. You will want to examine because it is the beginning of the dark, cold winter after all.

You let out a sigh of relief when you learn it’s just the furnace, but don’t breathe easy. 

Various noises, from smashes in the ductwork to the buzzing while the blower runs, most furnace commotions are quite harmless. However, there are some more significant noises to be aware of. Don’t defy the following weird furnace sounds.


Are you hearing a grinding or wailing sound comparable to what you’d hear when two pieces of metal rub together? This normally suggests there is an issue with the blower wheel within the furnace, and continuing to let it run could result in more harm to this significant component. For example, the blower wheel could have come available from the motor shaft, or the mount holding the wheel in place may have broken off, resulting in the part hitting the housing that safeguards it.

A boisterous ‘BOOM’ always seems to astonish and catch us off guard, but that doesn’t mean you should ignore it once you manage to catch your breath.

While these kinds of disturbances can happen when ducts expand and contract in very cold weather, particularly if your basement isn’t heated. This can also signify trouble with filthy burners or gas build-up from delayed ignition.


You may ask, what’s the distinction between a rumbling and a rattling furnace? These two disturbances can sound very similar but have varied problems behind them.

An eerie rumbling sound can be caused by a build-up of dirt on heating components, which can strain its function and could even lead to considerable mechanical problems in the future.

When you hear something rattling in your unit, this mainly indicates that the ducts are not of adequate size. When the air starts streaming through the ducts, the pressure difference can cause the pieces to hit together, causing the horrible rattling noise. It also suggests you’re possibly losing some of the heated or cooled air, so it’s worth having a professional look at the crisis during one of the heating services at Fort Smith.


If you hear a screeching or creaking sound coming from your furnace or the heating system, there’s a good chance you have an issue with the motor bearing or bad belt. The motor bearing may need a particular lubricant to help it move freely, while you must change a bad belt before it damages the blower. Leave working on your furnace’s motor or repairing the belt to the experts because it can be hazardous or lead to further issues.

Are you searching for the best furnace repair in Fort Smith? You don’t need to look further than Tom’s Heating and Air Conditioning. To book our expert and affordable heating services at Fort Smith, you can call us now at (479) 474-8850 or drop us an email at [email protected].