When your furnace is working properly, it should provide warmth without generating too much disruption. While it’s common to hear your furnace making noise as it begins running, other noises are indicating your furnace should get immediate professional help.

Here are some of the most frequent furnace noises and what they can mean. If your furnace is making an atypical noise, our friendly heating professionals are here to fix the problem with the best furnace repair in Streamwood, Illinois.

1. Furnace Makes a Banging Sound

You could have a critical problem on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it may signal there could be several problems. These range from gas accumulating in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy over time, so that’s why it’s important to set routine furnace maintenance with Pure Comfort Heating and Air Conditioning. One of the tasks our pros complete during this appointment is clean your furnace’s burners. When this part gets grubby, you might hear your furnace making a loud rumbling noise after ignition is delayed. The subsequent gas buildup might break your furnace’s heat exchanger, where natural gas transforms into warmth. Any breaks in it can emit carbon monoxide, which is regularly vented away from your home. This toxic gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Pure Comfort Heating and Air Conditioning recommends turning it off and reaching us at 630-313-2509. Significant natural gas in your furnace or a ruptured heat exchanger are critical issues that necessitate fast service.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide hot air throughout your house. If the ductwork wasn’t designed right or is aging, it can be loud when your furnace is on. This may be the case if your furnace makes a banging noise when it shuts off. Call Pure Comfort Heating and Air Conditioning at 630-313-2509 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

If you observe your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound typically indicates an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to operate on the correct voltage. If wires or the box isn’t tight enough, you could detect a low humming noise in the furnace when off. Your furnace also works with a blower motor, which sends hot or cooled air around your residence, and a capacitor, which starts the motor. If either of these pieces are going out, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it may be due to something minor, like an unsecure screw, or something serious, like a broken piece. In either case, we urge you to shut your furnace off and calling our heating pros at 630-313-2509 for support.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s making an effort to get your attention it could use some TLC. If you’ve skipped furnace maintenance the past few years, belts could be worn out or a bearing could need to be lubed. We realize that maintenance sometimes slips your mind, but our pros can get your furnace operating quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You might also hear whistling while the furnace is on if a floor vent isn’t secure. If you’ve looked at your vents but are still noticing sound, Pure Comfort Heating and Air Conditioning can provide support. It’s important to get loose ductwork fixed quickly, as it can create comfort troubles in your house and increase your utility costs.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a positive sign if you detect your furnace making a grinding noise. This metal-on-metal racket often means there’s a problem with your furnace’s blower. Shut down your furnace off right away and contact our professionals at 630-313-2509 for help.

When you’re noticing a strange noise from your furnace, Pure Comfort Heating and Air Conditioning is ready to provide assistance. Contact us at 630-313-2509 to book your furnace repair appointment today.