Weird Noises Coming from Your Furnace: What to Do About Them?

Weird Noises Coming from Your Furnace: What to Do About Them? - Fresh Air Furnace - Furnace and Duct Cleaning Calgary

Are you hearing weird noises coming from your furnace? Strange furnace noises are one of the main signs you need heating repair. Furnaces generally aren’t noisy, and most modern furnaces are designed for noise reduction. A properly functioning furnace shouldn’t make too much noise, especially after initially starting. A noisy furnace is generally in need of repairs, and the kind of sound you’re hearing can help determine the exact issue with the system. We’ll run through some of the most common furnace sounds, and what they may signify. If you’re hearing any of these or if you’re unsure of what you’re hearing, then give us a call and our experts at Fresh Air Furnace Services will inspect your furnace and make the necessary repairs.


Scraping noises!

A scraping noise most likely means that there’s a fault in the blower wheel of the furnace. This noise will sound like metal parts rubbing together, or nails scratching a chalkboard. You’ll want to call a furnace technician as soon as possible when you hear a scraping noise, and not just because it’s obnoxious: this sound could indicate issues that lead to significantly higher wear and tear on your system. The blower wheel can be making the scraping noise for different reasons. The wheel may have become loose and is making the noise by hitting the blower casing. Having one of our techs tighten the blower wheel can often resolve this problem. Sometimes, a broken blower wheel can also be the source of this distinct noise. Moreover, the motor mount may have broken causing the blower assembly to hit the housing.


Thwapping sound!

A thwapping sound indicates that something is stuck in the blades of the blower. Moreover, this sound can also be heard when something is stuck inside the housing of the furnace. The sound is similar to the noise made by playing cards when they are attached to the spokes of a bicycle wheel. Even if you can stand the noise, you should get the unit checked by one of our techs to get the problem resolved. Not taking any action can cause strain on the motor, resulting in a major system breakdown down the road.


Banging or popping noises!

Banging or popping sounds are very common. Most of the time, these noises come from the air ducts as they expand and contract. These are pretty harmless. However, be on the listen for much louder banging or popping sounds. They could indicate issues with combustion in the furnace. For example, loud, repeating pops could be caused by too much gas being in the chamber when the furnace ignites, leading to a very small explosion beyond that of the normal combustion process. This can put stress on all parts of the furnace, including the surrounding metal.


These are the most common and probable cause of the weird furnace noises you might be hearing. Keep in mind that every furnace is different, so the only way to be completely certain about the state of your furnace is to have a professional inspect your furnace. Give our experts at Fresh Air Furnace Services at 403-452-9528! No matter what noises you’re hearing, we’ll be able to help you figure out what’s wrong with your furnace and what repairs it needs.





Fresh Air Furnace Services