When your furnace is working properly, it should give warm air without creating too much disruption. While it’s common to catch your furnace making noise as it turns on, other disruptions are signaling your furnace requires immediate professional help.

Here are some of the most reported furnace noises and what they might be indicating. If your furnace is making a weird noise, our friendly heating pros are here to fix the problem with the best furnace repair in Milwaukee, Wisconsin .

1. Furnace Making a Banging Noise

You may have a serious problem on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it can indicate there could be a couple of problems. These include gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns filthy over time, so that’s why it’s critical to book annual furnace maintenance with Done Right Air. One of the things our professionals do during this work is clean your furnace’s burners. When this component gets dirty, you might hear your furnace making a loud rumbling noise after ignition takes more time. The resulting gas buildup may crack your furnace’s heat exchanger, where natural gas turns into warmth. Any breaks in it can discharge carbon monoxide, which is normally released outdoors. This toxic gas can be lethal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Done Right Air recommends turning it off and reaching us at 414-207-4034. Significant natural gas in your furnace or a cracked heat exchanger are critical issues that require immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide warm air across your home. If the ductwork wasn’t installed properly or is aging, it can be noisy when your furnace is heating. This could be the issue if your furnace makes a banging noise when it shuts off. Call Done Right Air at 414-207-4034 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 is telling you there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to work on the correct voltage. If wires or the box needs to be tightened, you might hear a low humming noise in the furnace when off. Your furnace also uses a blower motor, which sends heated or cold air throughout your house, and a capacitor, which turns on the motor. If either of these pieces are going out, they will buzz when the furnace turns on.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it could be due to something small, like an unsecure screw, or something major, like a broken component. In either case, we recommend shutting off your furnace and contacting our heating pros at 414-207-4034 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s trying to tell you it needs some TLC. If you’ve skipped furnace maintenance the last couple of years, belts could be worn out or a bearing may need to be lubed. We know that maintenance often slips your mind, but our pros can get your furnace operating quietly again rapidly.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re noticing your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You might also be aware of whistling while the furnace is on if a floor vent isn’t tight. If you’ve checked your vents but are still sensing whistling, Done Right Air can provide support. It’s critical to get loose ductwork repaired fast, since it can result in comfort problems in your home and drive up your utility bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not an encouraging sign if you detect your furnace making a grinding noise. This metal-on-metal noise frequently means there’s trouble with your furnace’s blower. Shut down your furnace off instantly and reach our pros at 414-207-4034 for help.

When you’re getting a weird noise from your furnace, Done Right Air is ready to support you. Contact us at 414-207-4034 to book your furnace repair appointment right away.