When your furnace is operating like it should, it should provide warm air without creating too much noise. While it’s normal to hear your furnace making noise as it begins running, other sounds are signaling your furnace requires immediate professional assistance.

Here are some of the most reported furnace noises and what they can mean. If your furnace is making a strange noise, our friendly heating specialists are here to help with the best furnace repair in Mount Pleasant, South Carolina.

1. Furnace Making a Banging Noise

You may have a critical situation on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it might indicate there could be a few problems. These range from gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system becomes filthy over time, so that’s why it’s essential to book annual furnace maintenance with Olde Towne Heating & Air. One of the things our professionals complete during this appointment is clean your furnace’s burners. When this piece gets grimy, you may hear your furnace making a loud rumbling noise if ignition takes longer than normal. The ensuing gas buildup may fracture your furnace’s heat exchanger, where natural gas transforms into warm air. Any breaks in it can emit carbon monoxide, which is normally vented outdoors. This toxic gas can be lethal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Olde Towne Heating & Air advises turning it off and reaching us at 843-485-0967. Too much natural gas in your furnace or a broken heat exchanger are serious problems that necessitate fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move warm air around your home. If the ductwork wasn’t put in right or is aging, it can be noisy when your furnace is on. This might be the problem if your furnace makes a banging noise when it shuts off. Get in touch with Olde Towne Heating & Air at 843-485-0967 and we’ll pinpoint the problem.

2. Furnace Buzzes Constantly

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 problem, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to run 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 hot or chilly air across your space, and a capacitor, which starts the motor. If either of these parts are failing, 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 can be the result of something small, like an unfastened screw, or something major, like a broken part. In either case, we recommend shutting off your furnace and getting in touch with our heating pros at 843-485-0967 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 requires some TLC. If you’ve skipped furnace maintenance the past few years, belts could be worn down or a bearing may need to be greased. We are aware that maintenance frequently slips your mind, but our pros can get your furnace heating quietly again rapidly.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s typically because of an air leak in your ductwork. You might also hear whistling while the furnace is working if a floor vent isn’t tight. If you’ve examined your vents but are still noticing whistling, Olde Towne Heating & Air can assist you. It’s essential to get loose ductwork taken care of without delay, as it can result in comfort troubles in your house and inflate your energy bills.

6. Furnace Making a Grinding Noise

It’s not a good sign if you detect your furnace making a grinding noise. This metal-on-metal racket typically means there’s an issue with your furnace’s blower. Switch off your furnace off promptly and call us at 843-485-0967 for assistance.

When you’re getting a strange noise from your furnace, Olde Towne Heating & Air is available to support you. Contact us at 843-485-0967 to schedule your furnace repair appointment now.