When your furnace is operating correctly, it should provide warmth without making too much disruption. While it’s normal to catch your furnace making noise as it turns on, other noises are signaling your furnace needs 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 help with the best furnace repair in Dundas and Northfield, Minnesota.

1. Furnace Makes a Banging Sound

You could have a serious issue on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it may signal there could be several problems. These involve gas accumulating in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system gets dirty over the years, so that’s why it’s important to book annual furnace maintenance with Better Air. One of the tasks our pros complete during this appointment is clean your furnace’s burners. When this component gets dirty, you may hear your furnace making a loud rumbling noise if ignition is delayed. The subsequent gas buildup might crack your furnace’s heat exchanger, where natural gas changes into warmth. Any fractures in it can emit carbon monoxide, which is regularly vented away from your home. This dangerous gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Better Air recommends turning it off and reaching us at 507-663-1208. Too much natural gas in your furnace or a cracked heat exchanger are critical troubles that should get immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to move hot air throughout your house. If the ductwork wasn’t designed correctly or is getting old, it can make a lot of noise when your furnace is heating. This might be the issue if your furnace makes a banging noise when it shuts off. Contact Better Air at 507-663-1208 and we’ll figure out the problem.

2. Furnace Makes a Buzzing Sound

If you notice your furnace making a buzzing noise, don’t wait to call us. A buzzing sound often means there’s an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to run on the proper voltage. If wires or the box needs to be tightened, you might detect a low humming noise in the furnace when off. Your furnace also uses a blower motor, which sends warm or cold air around your residence, and a capacitor, which starts the motor. If either of these parts are fading, they will buzz when the furnace starts.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it may be due to something minor, like a loose screw, or something major, like a broken part. In either case, we urge you to shut your furnace off and getting in touch with our heating professionals at 507-663-1208 for assistance.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s trying to alert you it requires some TLC. If you’ve skipped furnace maintenance recently, belts could be worn out or a bearing may need to be lubed. We realize that maintenance frequently slips your mind, but our pros can get your furnace operating quietly again rapidly.

5. Furnace Whistles

When you’re hearing your furnace making a whistling noise, it’s likely due to an air leak in your ductwork. You could also notice whistling while the furnace is working if a floor vent isn’t secure. If you’ve checked your vents but are still hearing whistling, Better Air can assist you. It’s important to get loose ductwork taken care of without delay, as it can create comfort problems in your residence and increase your heating bills.

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 typically means there’s trouble with your furnace’s blower. Switch off your furnace off immediately and contact us at 507-663-1208 for support.

When you’re getting an atypical noise from your furnace, Better Air is ready to provide assistance. Contact us at 507-663-1208 to book your furnace repair appointment today.