When your furnace is operating properly, it should give warm air without generating too much sound. While it’s normal to catch your furnace making noise as it begins running, other disruptions are signaling your furnace requires immediate professional assistance.

Here are some of the most reported furnace noises and what they could be indicating. If your furnace is making a strange noise, our friendly heating specialists are here to assist with the best furnace repair in Lexington, North Carolina.

1. Furnace Makes a Banging Sound

You might have an urgent issue on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it might mean there could be a couple of problems. These range from gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system gets grimy over the years, so that’s why it’s critical to book annual furnace maintenance with James Heating & A/C, Inc. One of the tasks our pros complete during this appointment is clean your furnace’s burners. When this piece gets grimy, you could hear your furnace making a loud rumbling noise when ignition takes more time. The subsequent gas buildup can break your furnace’s heat exchanger, where natural gas turns into heat. Any cracks in it can emit carbon monoxide, which is ordinarily released outside. This dangerous gas can be fatal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, James Heating & A/C, Inc advises turning it off and reaching us at 336-853-6070. Too much natural gas in your furnace or a fractured heat exchanger are serious troubles that necessitate fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to deliver heated air throughout your home. If the ductwork wasn’t designed right or is getting old, it can make a lot of noise when your furnace runs. This may be the case if your furnace makes a banging noise when it shuts off. Call James Heating & A/C, Inc at 336-853-6070 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

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

Your furnace depends on an internal transformer to operate on the proper voltage. If wires or the box is loose, you may notice a low humming noise in the furnace when off. Your furnace also uses a blower motor, which sends hot or cold air throughout your space, 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 could be due to something small, like an unsecure screw, or something serious, like a broken component. In either case, we urge you to shut your furnace off and calling our heating professionals at 336-853-6070 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s trying to alert you it requires some TLC. If you’ve skipped furnace maintenance recently, belts could be worn down or a bearing may need to be lubed. We know that maintenance often slips your mind, but our techs can get your furnace heating quietly again fast.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s typically because of an air leak in your ductwork. You might also notice whistling while the furnace is working if a floor vent is loose. If you’ve looked at your vents but are still sensing sound, James Heating & A/C, Inc can assist you. It’s critical to get loose ductwork repaired quickly, as it can make comfort troubles in your house and drive up your heating costs.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you hear your furnace making a grinding noise. This metal-on-metal sound frequently means there’s a problem with your furnace’s blower. Shut down your furnace off now and call our pros at 336-853-6070 for assistance.

When you’re noticing a weird noise from your furnace, James Heating & A/C, Inc is ready to support you. Contact us at 336-853-6070 to schedule your furnace repair appointment right away.