When your furnace is operating like it should, it should deliver heat without making too much sound. While it’s expected to notice your furnace making noise as it turns on, other sounds are showing your furnace needs immediate professional assistance.

Here are some of the most common furnace noises and what they might be signaling. If your furnace is making a weird noise, our friendly heating pros are here to fix the problem with the best furnace repair in Elk River, Minnesota.

1. Furnace Makes Banging or Knocking Sounds

You may have a critical situation on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it can indicate there could be a few problems. These include gas accumulating in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system turns filthy over the years, so that’s why it’s essential to set routine furnace maintenance with Home Comfort Heating & Air. One of the tasks our professionals complete during this appointment is clean your furnace’s burners. When this piece gets grubby, you may hear your furnace making a loud rumbling noise after ignition is delayed. The ensuing gas buildup can fracture your furnace’s heat exchanger, where natural gas transforms into warmth. Any fractures in it can emit carbon monoxide, which is regularly vented outside. This toxic gas can be deadly in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Home Comfort Heating & Air recommends turning it off and calling us at 763-276-0617. Excessive natural gas in your furnace or a cracked heat exchanger are dangerous troubles that necessitate immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide warm air around your home. If the ductwork wasn’t designed correctly or is aging, 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. Call Home Comfort Heating & Air at 763-276-0617 and we’ll figure out the problem.

2. Furnace Buzzes Constantly

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

Your furnace uses an internal transformer to run on the right voltage. If wires or the box needs to be tightened, you could notice a low humming noise in the furnace when off. Your furnace also has a blower motor, which moves warm or cooled air across your house, and a capacitor, which turns on the motor. If either of these components are fading, they will buzz when the furnace switches on.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it can be due to something small, like an unsecure screw, or something critical, like a broken component. In either case, we urge you to shut your furnace off and calling our heating specialists at 763-276-0617 for help.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s making an effort to get your attention it could use some TLC. If you’ve forgotten furnace maintenance recently, belts could be worn down or a bearing might need to be greased. We realize that maintenance frequently slips your mind, but our professionals can get your furnace running quietly again rapidly.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s typically due to an air leak in your ductwork. You could also notice whistling while the furnace is running if a floor vent isn’t secure. If you’ve checked your vents but are still hearing noise, Home Comfort Heating & Air can provide support. It’s essential to get loose ductwork taken care of quickly, because it can make comfort issues in your residence and inflate your utility bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a good sign if you notice your furnace making a grinding noise. This metal-on-metal noise usually means there’s an issue with your furnace’s blower. Switch off your furnace off instantly and contact our pros at 763-276-0617 for assistance.

When you’re getting an uncommon noise from your furnace, Home Comfort Heating & Air is ready to support you. Contact us at 763-276-0617 to book your furnace repair appointment now.