When your furnace is working correctly, it should give heat without creating too much sound. While it’s expected to notice your furnace making noise as it starts up, other sounds are showing your furnace requires immediate professional help.

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

1. Furnace Making a Banging Noise

You may have a critical issue 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 couple of problems. These range from gas building up in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns dirty over time, so that’s why it’s essential to book routine furnace maintenance with GV Heating & Air. One of the jobs our technicians do during this appointment is clean your furnace’s burners. When this part gets dirty, you may hear your furnace making a loud rumbling noise after ignition takes longer than normal. The following gas buildup might break your furnace’s heat exchanger, where natural gas changes into warmth. Any cracks in it can discharge carbon monoxide, which is normally vented outdoors. This hazardous gas can be fatal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, GV Heating & Air urges you to turn it off and calling us at 763-535-2000. Too much natural gas in your furnace or a cracked heat exchanger are dangerous issues that should get immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to deliver heated air across your home. If the ductwork wasn’t designed right or is getting dated, it can be noisy when your furnace runs. This can be the case if your furnace makes a banging noise when it shuts off. Contact GV Heating & Air at 763-535-2000 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

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

Your furnace depends on an internal transformer to operate on the correct voltage. If wires or the box is loose, you may detect a low humming noise in the furnace when off. Your furnace also uses a blower motor, which sends heated or cooled air around your residence, and a capacitor, which triggers the motor. If either of these components are going out, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it could be related to something minor, like an unsecure screw, or something serious, like a broken part. In either case, we urge you to shut your furnace off and contacting our heating pros at 763-535-2000 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s making an effort to alert you it requires some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be worn down or a bearing could need to be greased. We know that maintenance often slips your mind, but our pros can get your furnace heating quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s frequently because of an air leak in your ductwork. You may also be aware of whistling while the furnace is working if a floor vent isn’t tight. If you’ve checked your vents but are still sensing sound, GV Heating & Air can provide support. It’s essential to get loose ductwork repaired quickly, as it can result in comfort issues in your residence and drive up your gas expenses.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you notice your furnace making a grinding noise. This metal-on-metal noise often means there’s a problem with your furnace’s blower. Shut down your furnace off promptly and reach our pros at 763-535-2000 for assistance.

When you’re hearing an uncommon noise from your furnace, GV Heating & Air is here to support you. Contact us at 763-535-2000 to schedule your furnace repair appointment today.