When your furnace is operating properly, it should provide heat without creating too much noise. While it’s normal to hear your furnace making noise as it starts up, other sounds are indicating your furnace requires immediate professional help.

Here are some of the most reported furnace noises and what they might mean. If your furnace is making an odd noise, our friendly heating pros are here to help with the best furnace repair in Mankato area, Minnesota.

1. Furnace Makes Banging or Knocking Sounds

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

Banging Sounds Coming from Your Furnace

Your heating system becomes filthy over time, so that’s why it’s essential to set seasonal furnace maintenance with Northern Comfort Inc. One of the things our technicians perform 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 ensuing gas buildup can crack your furnace’s heat exchanger, where natural gas transforms into warm air. Any cracks in it can leak carbon monoxide, which is ordinarily vented away from your home. This dangerous gas can be deadly in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Northern Comfort Inc advises turning it off and calling us at 507-387-6596. Too much natural gas in your furnace or a cracked heat exchanger are hazardous troubles that should get immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move hot air around your house. If the ductwork wasn’t installed properly or is getting old, it can be noisy when your furnace is heating. This might be the case if your furnace makes a banging noise when it shuts off. Contact Northern Comfort Inc at 507-387-6596 and we’ll figure out the problem.

2. Furnace Buzzes Constantly

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

Your furnace uses an internal transformer to work on the right 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 works with a blower motor, which moves warm or cold air across your rooms, and a capacitor, which starts the motor. If either of these parts 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 an unfastened screw, or something major, like a broken part. In either case, we urge you to shut your furnace off and calling our heating professionals at 507-387-6596 for help.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s attempting to tell you it requires some TLC. If you’ve skipped furnace maintenance recently, belts could be worn out or a bearing might need to be greased. We are aware that maintenance frequently slips your mind, but our techs can get your furnace operating quietly again quickly.

5. Furnace Whistles

When you’re hearing your furnace making a whistling noise, it’s likely the result of an air leak in your ductwork. You could also notice whistling while the furnace is operating if a floor vent is loose. If you’ve looked at your vents but are still sensing sound, Northern Comfort Inc can help. It’s important to get loose ductwork taken care of without delay, because it can create comfort problems in your residence and drive up your energy bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a good sign if you hear your furnace making a grinding noise. This metal-on-metal noise frequently means there’s a problem with your furnace’s blower. Turn off your furnace off instantly and reach our professionals at 507-387-6596 for assistance.

When you’re getting an uncommon noise from your furnace, Northern Comfort Inc is ready to help. Contact us at 507-387-6596 to request your furnace repair appointment right away.