When your furnace is running like it should, it should deliver warmth without creating too much sound. While it’s normal to notice your furnace making noise as it starts up, other disruptions are signaling your furnace requires immediate professional help.

Here are some of the most frequent furnace noises and what they could mean. If your furnace is making a weird noise, our friendly heating specialists are here to help with the best furnace repair in Wilmington, Delaware.

1. Furnace Makes Banging or Knocking Sounds

You could have a critical issue on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it might signal there could be a couple of problems. These involve gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns filthy over time, so that’s why it’s important to book seasonal furnace maintenance with Brandywine Heating & Air. One of the jobs our technicians complete during this appointment is clean your furnace’s burners. When this part gets grimy, you might hear your furnace making a loud rumbling noise after ignition takes more time. The following gas buildup may break your furnace’s heat exchanger, where natural gas changes into heat. Any fractures in it can emit carbon monoxide, which is ordinarily released away from your home. This hazardous gas can be lethal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Brandywine Heating & Air recommends turning it off and reaching us at 302-261-3596. Too much natural gas in your furnace or a ruptured heat exchanger are hazardous problems that should get prompt repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide heated air across your residence. If the ductwork wasn’t installed properly or is getting dated, it can be loud when your furnace runs. This might be the issue if your furnace makes a banging noise when it shuts off. Contact Brandywine Heating & Air at 302-261-3596 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

If you observe your furnace making a buzzing noise, don’t delay calling us. A buzzing sound usually indicates 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 needs to be tightened, you may notice a low humming noise in the furnace when off. Your furnace also works with a blower motor, which distributes warm or cold air throughout your home, and a capacitor, which starts the motor. If either of these components are fading, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it may be due to something small, like an unsecure screw, or something major, like a broken component. In either case, we recommend shutting off your furnace and getting in touch with our heating professionals at 302-261-3596 for assistance.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s making an effort to get your attention it requires some TLC. If you’ve skipped furnace maintenance recently, belts could be worn down or a bearing could need to be lubed. We realize that maintenance often slips your mind, but our professionals can get your furnace running quietly again rapidly.

5. Furnace Whistles

When you’re detecting your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You could also notice whistling while the furnace is operating if a floor vent isn’t secure. If you’ve examined your vents but are still noticing noise, Brandywine Heating & Air can provide support. It’s critical to get loose ductwork repaired fast, as it can result in comfort troubles in your house and inflate your utility costs.

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 sound frequently means there’s trouble with your furnace’s blower. Shut down your furnace off immediately and reach us at 302-261-3596 for support.

When you’re hearing an uncommon noise from your furnace, Brandywine Heating & Air is available to provide assistance. Contact us at 302-261-3596 to schedule your furnace repair appointment right away.