When your furnace is working properly, it should deliver warm air without creating too much noise. While it’s expected to notice your furnace making noise as it turns on, other noises are showing your furnace requires immediate professional help.

Here are some of the most frequent furnace noises and what they might be signaling. If your furnace is making a strange noise, our friendly heating pros are here to assist with the best furnace repair in Plover, Wisconsin.

1. Furnace Making a Banging Noise

You may have a critical 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 several problems. These range from 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 set seasonal furnace maintenance with Point Heating & Cooling. One of the tasks our professionals perform during this appointment is clean your furnace’s burners. When this piece gets grimy, you may hear your furnace making a loud rumbling noise after ignition is delayed. The following gas buildup can break your furnace’s heat exchanger, where natural gas turns into warm air. Any cracks in it can leak carbon monoxide, which is normally vented outdoors. This dangerous gas can be deadly in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Point Heating & Cooling advises turning it off and reaching us at 715-504-0533. Significant natural gas in your furnace or a cracked heat exchanger are dangerous troubles that require prompt repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide hot air across your residence. If the ductwork wasn’t put in properly or is aging, it can make a lot of noise when your furnace is on. This might be the case if your furnace makes a banging noise when it shuts off. Get in touch with Point Heating & Cooling at 715-504-0533 and we’ll pinpoint the problem.

2. Furnace Makes a Buzzing Sound

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

Your furnace relies on an internal transformer to work on the proper voltage. If wires or the box is loose, you could notice a low humming noise in the furnace when off. Your furnace also has a blower motor, which moves warm or cold air throughout your residence, and a capacitor, which starts the motor. If either of these parts are failing, 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 the result of something little, like an unsecure screw, or something major, like a broken part. In either case, we recommend shutting off your furnace and calling our heating specialists at 715-504-0533 for support.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s attempting to alert you it could use 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 technicians can get your furnace operating quietly again rapidly.

5. Furnace Whistles

When you’re detecting your furnace making a whistling noise, it’s likely due to an air leak in your ductwork. You may also hear whistling while the furnace is working if a floor vent isn’t secure. If you’ve checked your vents but are still noticing noise, Point Heating & Cooling can help. It’s essential to get loose ductwork repaired quickly, because it can make comfort problems in your residence and inflate your energy bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a good sign if you notice your furnace making a grinding noise. This metal-on-metal noise often means there’s an issue with your furnace’s blower. Switch off your furnace off immediately and call us at 715-504-0533 for assistance.

When you’re hearing an atypical noise from your furnace, Point Heating & Cooling is ready to support you. Contact us at 715-504-0533 to book your furnace repair appointment right away.