When your furnace is working properly, it should deliver warmth without making too much noise. While it’s normal to hear your furnace making noise as it starts up, other noises are indicating your furnace requires immediate professional assistance.

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

1. Furnace Makes a Banging Sound

You might have a serious problem on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it may signal there could be several problems. These include gas building up in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy over the years, so that’s why it’s important to book routine furnace maintenance with Home Comfort Heating & Air. One of the jobs our professionals do during this service is clean your furnace’s burners. When this part gets grubby, you could hear your furnace making a loud rumbling noise if ignition is delayed. The ensuing gas buildup can fracture your furnace’s heat exchanger, where natural gas transforms into heat. Any fractures in it can leak carbon monoxide, which is ordinarily released outdoors. This hazardous gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Home Comfort Heating & Air advises turning it off and contacting us at 763-276-0617. Significant natural gas in your furnace or a ruptured heat exchanger are serious issues that require immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to deliver warm air around your residence. If the ductwork wasn’t installed right or is getting dated, it can be noisy when your furnace runs. This may be the case if your furnace makes a banging noise when it shuts off. Contact 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 usually indicates an electrical issue, 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 isn’t tight enough, you may detect a low humming noise in the furnace when off. Your furnace also has a blower motor, which distributes warm or chilly air across your space, and a capacitor, which starts the motor. If either of these pieces are fading, 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 related to something minor, like a loose screw, or something serious, like a broken component. In either case, we advise shutting your furnace off and contacting our heating specialists at 763-276-0617 for assistance.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s attempting to tell you it requires some TLC. If you’ve neglected furnace maintenance recently, belts could be worn out or a bearing may need to be lubricated. We realize that maintenance frequently slips your mind, but our professionals can get your furnace heating quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re detecting 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 working if a floor vent is loose. If you’ve checked your vents but are still noticing sound, Home Comfort Heating & Air can assist you. It’s essential to get loose ductwork fixed without delay, since it can create comfort problems in your home and increase your energy expenses.

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 sound frequently means there’s a problem with your furnace’s blower. Shut down your furnace off instantly and contact our professionals at 763-276-0617 for support.

When you’re hearing a strange noise from your furnace, Home Comfort Heating & Air is available to support you. Contact us at 763-276-0617 to book your furnace repair appointment now.