When your furnace is running properly, it should deliver warmth without making too much disruption. While it’s normal to notice your furnace making noise as it starts up, other noises are showing your furnace needs immediate professional help.

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

1. Furnace Makes a Banging Sound

You might have an urgent problem on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it may mean there could be a few problems. These include gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns dirty as time passes, so that’s why it’s important to set yearly furnace maintenance with Arizona Comfort Systems. One of the things our pros do during this service is clean your furnace’s burners. When this component gets grubby, you might hear your furnace making a loud rumbling noise when ignition is delayed. The subsequent gas buildup can break your furnace’s heat exchanger, where natural gas changes into warm air. Any cracks in it can discharge carbon monoxide, which is ordinarily emitted outside. This toxic gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Arizona Comfort Systems urges you to turn it off and reaching us at 520-415-5681. Significant natural gas in your furnace or a broken heat exchanger are dangerous issues that should get fast attention.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to deliver heated air throughout your house. If the ductwork wasn’t put in right or is getting old, it can be loud when your furnace is heating. This could be the issue if your furnace makes a banging noise when it shuts off. Get in touch with Arizona Comfort Systems at 520-415-5681 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

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

Your furnace uses an internal transformer to run on the proper voltage. If wires or the box isn’t tight enough, you might notice a low humming noise in the furnace when off. Your furnace also has a blower motor, which moves heated or cold air throughout your house, and a capacitor, which starts the motor. If either of these pieces are fading, they will buzz when the furnace turns on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it could be related to something small, like an unfastened screw, or something critical, like a broken part. In either case, we recommend shutting off your furnace and getting in touch with our heating specialists at 520-415-5681 for assistance.

4. Furnace Squeals

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

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s typically due to an air leak in your ductwork. You might also be aware of whistling while the furnace is on if a floor vent is loose. If you’ve looked at your vents but are still hearing sound, Arizona Comfort Systems can provide support. It’s essential to get loose ductwork fixed quickly, because it can make comfort problems in your house and increase your energy costs.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not an encouraging sign if you hear your furnace making a grinding noise. This metal-on-metal sound usually means there’s an issue with your furnace’s blower. Shut down your furnace off instantly and call us at 520-415-5681 for help.

When you’re hearing a strange noise from your furnace, Arizona Comfort Systems is available to support you. Contact us at 520-415-5681 to book your furnace repair appointment right away.