When your furnace is operating correctly, it should provide warm air without making too much noise. While it’s expected to hear your furnace making noise as it begins running, other sounds are signaling your furnace should get immediate professional help.

Here are some of the most reported furnace noises and what they might be signaling. If your furnace is making an atypical noise, our friendly heating pros are here to assist with the best furnace repair in Dundas and Northfield, Minnesota.

1. Furnace Making a Banging Noise

You may have a critical situation on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it might mean there could be several problems. These involve gas building up 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 critical to set seasonal furnace maintenance with Better Air. One of the things our techs do during this service is clean your furnace’s burners. When this part gets grubby, you might hear your furnace making a loud rumbling noise when ignition takes longer than normal. The ensuing gas buildup might fracture your furnace’s heat exchanger, where natural gas changes into warm air. Any breaks in it can leak carbon monoxide, which is regularly emitted away from your home. This toxic gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Better Air advises turning it off and contacting us at 507-663-1208. Too much natural gas in your furnace or a ruptured heat exchanger are critical issues that should get immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide heated air across your home. If the ductwork wasn’t put in correctly or is getting old, it can make a lot of noise when your furnace runs. This can be the case if your furnace makes a banging noise when it shuts off. Get in touch with Better Air at 507-663-1208 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

If you observe your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound typically indicates an electrical situation, 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 isn’t tight enough, you may notice a low humming noise in the furnace when off. Your furnace also uses a blower motor, which moves hot or cooled air around your rooms, and a capacitor, which triggers the motor. If either of these parts are fading, they will buzz when the furnace switches on.

3. Furnace Rattles

If your furnace is making a rattling noise, it can be the result of something small, like an unfastened screw, or something critical, like a broken component. In either case, we recommend shutting off your furnace and calling our heating specialists at 507-663-1208 for help.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s trying to tell you it needs some TLC. If you’ve skipped furnace maintenance the past few years, belts could be worn out or a bearing could need to be lubricated. We know that maintenance frequently slips your mind, but our professionals can get your furnace running quietly again fast.

5. Furnace Whistles

When you’re hearing your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You could also notice whistling while the furnace is running if a floor vent is loose. If you’ve checked your vents but are still hearing noise, Better Air can assist you. It’s critical to get loose ductwork repaired without delay, as it can result in comfort problems in your residence and inflate your energy bills.

6. Furnace Making a Grinding Noise

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal sound typically means there’s trouble with your furnace’s blower. Turn off your furnace off instantly and call us at 507-663-1208 for help.

When you’re noticing a weird noise from your furnace, Better Air is ready to help. Contact us at 507-663-1208 to schedule your furnace repair appointment now.