When your furnace is working properly, it should provide warm air without creating too much noise. While it’s common to catch your furnace making noise as it starts up, other sounds are showing your furnace needs immediate professional support.

Here are some of the most common furnace noises and what they can be signaling. If your furnace is making an atypical noise, our friendly heating professionals are here to assist with the best furnace repair in Circleville, Ohio.

1. Furnace Makes Banging or Knocking Sounds

You may have a critical problem 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 few problems. These range from gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns dirty over the years, so that’s why it’s important to book annual furnace maintenance with Stephen Hurst Pack Heating and Cooling. One of the tasks our techs complete during this service is clean your furnace’s burners. When this component gets grimy, you might hear your furnace making a loud rumbling noise if ignition is delayed. The subsequent gas buildup might crack your furnace’s heat exchanger, where natural gas transforms into warm air. Any cracks in it can emit carbon monoxide, which is ordinarily vented outdoors. This toxic gas can be lethal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Stephen Hurst Pack Heating and Cooling recommends turning it off and contacting us at 740-474-5940. Excessive natural gas in your furnace or a broken heat exchanger are serious issues that should get fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to deliver warm air around your residence. If the ductwork wasn’t designed properly or is getting dated, it can be loud when your furnace is heating. This could be the problem if your furnace makes a banging noise when it shuts off. Contact Stephen Hurst Pack Heating and Cooling at 740-474-5940 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

If you notice your furnace making a buzzing noise, don’t wait to call us. A buzzing sound usually means there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to work on the correct voltage. If wires or the box needs to be tightened, you might notice a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves hot or chilly air throughout your home, and a capacitor, which turns on the motor. If either of these parts are fading, 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 related to something minor, like an unfastened screw, or something critical, like a broken part. In either case, we advise shutting your furnace off and calling our heating pros at 740-474-5940 for support.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s attempting to tell you it requires some TLC. If you’ve skipped furnace maintenance recently, belts could be worn out or a bearing might need to be lubed. We are aware that maintenance often slips your mind, but our professionals can get your furnace running quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s frequently the result of an air leak in your ductwork. You could also notice whistling while the furnace is working if a floor vent isn’t secure. If you’ve checked your vents but are still hearing whistling, Stephen Hurst Pack Heating and Cooling can assist you. It’s essential to get loose ductwork repaired quickly, since it can create comfort problems in your residence and inflate your energy costs.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a good sign if you hear your furnace making a grinding noise. This metal-on-metal noise frequently means there’s trouble with your furnace’s blower. Turn off your furnace off instantly and call our pros at 740-474-5940 for help.

When you’re noticing an atypical noise from your furnace, Stephen Hurst Pack Heating and Cooling is ready to provide assistance. Contact us at 740-474-5940 to request your furnace repair appointment right away.