When your furnace is operating correctly, it should provide warm air without generating too much sound. While it’s common to notice your furnace making noise as it begins running, other noises are signaling your furnace needs immediate professional assistance.

Here are some of the most common furnace noises and what they can be signaling. If your furnace is making an odd noise, our friendly heating pros are here to help with the best furnace repair in Safford, Arizona.

1. Furnace Making a Banging Noise

You could have an urgent 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 few problems. These range from gas accumulating in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system turns dirty over time, so that’s why it’s critical to book yearly furnace maintenance with B&D Air Conditioning. One of the tasks our professionals perform during this appointment is clean your furnace’s burners. When this part gets grubby, you could hear your furnace making a loud rumbling noise after ignition takes more time. The resulting gas buildup might fracture your furnace’s heat exchanger, where natural gas turns into warm air. Any breaks in it can emit carbon monoxide, which is regularly emitted outdoors. This toxic gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, B&D Air Conditioning recommends turning it off and contacting us at 928-432-6018. Significant natural gas in your furnace or a broken heat exchanger are hazardous problems that require prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to deliver heated air across your residence. If the ductwork wasn’t designed right or is getting old, it can be loud when your furnace is heating. This might be the problem if your furnace makes a banging noise when it shuts off. Get in touch with B&D Air Conditioning at 928-432-6018 and we’ll figure out 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 typically is telling you there’s an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to work on the right voltage. If wires or the box is loose, you may notice a low humming noise in the furnace when off. Your furnace also works with a blower motor, which distributes heated or cold air across 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 Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it may be due to something small, like a loose screw, or something critical, like a broken part. In either case, we advise shutting your furnace off and contacting our heating professionals at 928-432-6018 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s trying to tell you it could use some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be worn out or a bearing might need to be lubricated. We realize that maintenance sometimes slips your mind, but our techs can get your furnace operating quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You might also hear whistling while the furnace is on if a floor vent isn’t secure. If you’ve examined your vents but are still hearing sound, B&D Air Conditioning can assist you. It’s important to get loose ductwork fixed fast, since it can result in comfort issues in your house and inflate your heating bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal racket often means there’s a problem with your furnace’s blower. Turn off your furnace off now and reach our pros at 928-432-6018 for help.

When you’re getting an uncommon noise from your furnace, B&D Air Conditioning is ready to help. Contact us at 928-432-6018 to book your furnace repair appointment right away.