When your furnace is working correctly, it should give warm air without creating too much disruption. While it’s expected to hear your furnace making noise as it turns on, other sounds are signaling your furnace should get immediate professional assistance.

Here are some of the most common furnace noises and what they might be indicating. If your furnace is making an atypical noise, our friendly heating professionals are here to help with the best furnace repair in Greensburg, Indiana.

1. Furnace Makes Banging or Knocking Sounds

You may have a serious situation on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it may indicate there could be a few problems. These include gas building up in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system becomes filthy over the years, so that’s why it’s critical to book seasonal furnace maintenance with Wallpe Heating & Cooling. One of the jobs our technicians do during this work is clean your furnace’s burners. When this piece gets grimy, you might hear your furnace making a loud rumbling noise if ignition takes longer than normal. The ensuing gas buildup can fracture your furnace’s heat exchanger, where natural gas changes into heat. Any cracks 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, Wallpe Heating & Cooling urges you to turn it off and contacting us at 812-663-7252. Excessive natural gas in your furnace or a fractured heat exchanger are serious troubles that require immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to deliver hot air across your home. If the ductwork wasn’t designed properly or is getting dated, it can make a lot of noise when your furnace is heating. This might be the problem if your furnace makes a banging noise when it shuts off. Call Wallpe Heating & Cooling at 812-663-7252 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

If you hear your furnace making a buzzing noise, don’t wait to call us. A buzzing sound usually is telling you 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 isn’t tight enough, you might detect a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves hot or chilly air around your house, and a capacitor, which triggers the motor. If either of these components are failing, they will buzz when the furnace starts.

3. Furnace Rattles

If your furnace is making a rattling noise, it can be due to something small, like an unsecure screw, or something major, like a broken component. In either case, we urge you to shut your furnace off and contacting our heating pros at 812-663-7252 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s making an effort to get your attention it could use some TLC. If you’ve skipped furnace maintenance the past few years, belts could be worn out or a bearing might need to be lubricated. We realize that maintenance often slips your mind, but our technicians can get your furnace running quietly again quickly.

5. Furnace Whistles

When you’re noticing your furnace making a whistling noise, it’s typically the result of an air leak in your ductwork. You might also hear whistling while the furnace is operating if a floor vent is loose. If you’ve checked your vents but are still sensing sound, Wallpe Heating & Cooling can assist you. It’s important to get loose ductwork fixed quickly, as it can make comfort problems in your home and drive up your gas bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a positive sign if you detect your furnace making a grinding noise. This metal-on-metal racket typically means there’s a problem with your furnace’s blower. Switch off your furnace off instantly and contact our professionals at 812-663-7252 for support.

When you’re hearing an atypical noise from your furnace, Wallpe Heating & Cooling is here to provide assistance. Contact us at 812-663-7252 to schedule your furnace repair appointment right away.