When your furnace is operating correctly, it should provide warm air without making too much sound. While it’s common to notice your furnace making noise as it turns on, other noises are signaling your furnace should get immediate professional assistance.

Here are some of the most frequent furnace noises and what they could be signaling. If your furnace is making a weird noise, our friendly heating professionals are here to assist with the best furnace repair in Mount Pleasant, South Carolina.

1. Furnace Makes a Banging Sound

You might have a serious issue 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 several problems. These involve gas building up in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system becomes dirty as time passes, so that’s why it’s essential to schedule annual furnace maintenance with Olde Towne Heating & Air. One of the tasks our technicians do during this service is clean your furnace’s burners. When this part gets grubby, you could hear your furnace making a loud rumbling noise after ignition takes longer than normal. The resulting gas buildup might crack your furnace’s heat exchanger, where natural gas changes into warm air. Any breaks in it can leak carbon monoxide, which is regularly released outdoors. This hazardous gas can be lethal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Olde Towne Heating & Air urges you to turn it off and reaching us at 843-485-0967. Significant natural gas in your furnace or a fractured heat exchanger are dangerous issues that should get fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to deliver hot air around your home. If the ductwork wasn’t designed properly or is aging, it can be noisy when your furnace is on. This may be the issue if your furnace makes a banging noise when it shuts off. Call Olde Towne Heating & Air at 843-485-0967 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 means there’s an electrical problem, 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 needs to be tightened, you might notice a low humming noise in the furnace when off. Your furnace also works with a blower motor, which sends heated or cold air around your house, and a capacitor, which turns on the motor. If either of these pieces are going out, they will buzz when the furnace turns on.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it may be due to something little, like an unfastened screw, or something major, like a broken component. In either case, we advise shutting your furnace off and contacting our heating professionals at 843-485-0967 for assistance.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s trying to alert you it could use some TLC. If you’ve skipped furnace maintenance the last couple of years, belts could be worn down or a bearing might need to be lubed. We realize that maintenance sometimes slips your mind, but our techs can get your furnace running quietly again fast.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re noticing your furnace making a whistling noise, it’s frequently because of an air leak in your ductwork. You may also notice whistling while the furnace is operating if a floor vent is loose. If you’ve checked your vents but are still hearing whistling, Olde Towne Heating & Air can provide support. It’s critical to get loose ductwork fixed quickly, because it can result in comfort problems in your house and increase your heating bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal sound frequently means there’s an issue with your furnace’s blower. Turn off your furnace off promptly and reach our pros at 843-485-0967 for help.

When you’re hearing a strange noise from your furnace, Olde Towne Heating & Air is ready to help. Contact us at 843-485-0967 to book your furnace repair appointment right away.