When your furnace is working like it should, it should provide heat without creating too much noise. While it’s normal to hear your furnace making noise as it begins running, other noises are signaling your furnace needs immediate professional support.

Here are some of the most frequent furnace noises and what they can mean. If your furnace is making an odd noise, our friendly heating professionals are here to assist with the best furnace repair in Crystal and Twin Cities, Minnesota.

1. Furnace Making a Banging Noise

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

Banging Sounds Coming from Your Furnace

Your heating system gets dirty over time, so that’s why it’s critical to book annual furnace maintenance with GV Heating & Air. One of the things our techs perform during this service is clean your furnace’s burners. When this component gets dirty, you might hear your furnace making a loud rumbling noise after ignition takes longer than normal. The resulting gas buildup may crack your furnace’s heat exchanger, where natural gas changes into warm air. Any breaks in it can discharge carbon monoxide, which is regularly released outdoors. This toxic gas can be fatal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, GV Heating & Air advises turning it off and calling us at 763-535-2000. Too much natural gas in your furnace or a fractured heat exchanger are critical problems that necessitate prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to provide heated air throughout your home. If the ductwork wasn’t designed correctly or is aging, it can be loud when your furnace runs. This may be the issue if your furnace makes a banging noise when it shuts off. Get in touch with GV Heating & Air at 763-535-2000 and we’ll pinpoint the problem.

2. Furnace Buzzes Constantly

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

Your furnace relies on an internal transformer to operate on the proper 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 works with a blower motor, which moves warm or chilly air across your home, and a capacitor, which starts the motor. If either of these pieces 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 could be related to something little, like an unsecure screw, or something critical, like a broken piece. In either case, we recommend shutting off your furnace and contacting our heating pros at 763-535-2000 for support.

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 could use some TLC. If you’ve forgotten furnace maintenance the past few years, belts could be worn out or a bearing might need to be lubricated. We know that maintenance often slips your mind, but our technicians can get your furnace heating quietly again fast.

5. Furnace Whistles

When you’re noticing your furnace making a whistling noise, it’s frequently the result of an air leak in your ductwork. You could also hear whistling while the furnace is working if a floor vent isn’t secure. If you’ve looked at your vents but are still noticing noise, GV Heating & Air can help. It’s essential to get loose ductwork taken care of fast, as it can create comfort problems in your house and drive up your heating bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not an encouraging sign if you notice your furnace making a grinding noise. This metal-on-metal noise usually means there’s a problem with your furnace’s blower. Shut down your furnace off now and call us at 763-535-2000 for support.

When you’re noticing an atypical noise from your furnace, GV Heating & Air is available to provide assistance. Contact us at 763-535-2000 to request your furnace repair appointment today.