When your furnace is operating correctly, it should deliver heat without generating too much noise. While it’s common to catch your furnace making noise as it begins running, other noises are signaling your furnace requires immediate professional assistance.

Here are some of the most common furnace noises and what they might mean. If your furnace is making a strange noise, our friendly heating specialists are here to help with the best furnace repair in Croydon, Pennsylvania.

1. Furnace Makes a Banging Sound

You might have a serious situation 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 include gas increasing in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system gets grimy over time, so that’s why it’s critical to schedule yearly furnace maintenance with Indoor Comfort Systems HVAC. One of the tasks our technicians perform during this work is clean your furnace’s burners. When this component gets grubby, you could hear your furnace making a loud rumbling noise if ignition is delayed. The resulting gas buildup may break your furnace’s heat exchanger, where natural gas changes into warm air. Any fractures in it can discharge carbon monoxide, which is normally emitted outdoors. This dangerous gas can be fatal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Indoor Comfort Systems HVAC advises turning it off and calling us at 215-741-5505. Significant natural gas in your furnace or a fractured heat exchanger are serious issues that necessitate prompt repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide hot air across your residence. If the ductwork wasn’t installed right or is aging, it can be loud when your furnace runs. This might be the problem if your furnace makes a banging noise when it shuts off. Contact Indoor Comfort Systems HVAC at 215-741-5505 and we’ll pinpoint the problem.

2. Furnace Buzzes Constantly

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

Your furnace relies on an internal transformer to run on the correct voltage. If wires or the box isn’t tight enough, you may hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which sends heated or cooled air across your home, and a capacitor, which starts the motor. If either of these pieces are fading, 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 can be due to something little, like a loose screw, or something serious, like a broken component. In either case, we recommend shutting off your furnace and contacting our heating pros at 215-741-5505 for assistance.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s attempting to alert you it needs some TLC. If you’ve neglected furnace maintenance recently, belts could be worn down or a bearing could need to be greased. We are aware that maintenance frequently slips your mind, but our techs can get your furnace operating quietly again fast.

5. Furnace Making a Whistling Noise

When you’re noticing your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You could also hear whistling while the furnace is on if a floor vent is loose. If you’ve examined your vents but are still noticing whistling, Indoor Comfort Systems HVAC can assist you. It’s critical to get loose ductwork repaired fast, as it can make comfort problems in your home and drive up your heating expenses.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal racket typically means there’s a problem with your furnace’s blower. Turn off your furnace off promptly and call our pros at 215-741-5505 for assistance.

When you’re noticing a weird noise from your furnace, Indoor Comfort Systems HVAC is ready to help. Contact us at 215-741-5505 to request your furnace repair appointment today.