When your furnace is running correctly, it should give warmth without creating too much disruption. While it’s normal to notice 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 could be signaling. If your furnace is making a weird noise, our friendly heating specialists are here to help with the best furnace repair in Fredericksburg, Virginia.

1. Furnace Makes a Banging Sound

You may have an urgent problem on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it might indicate there could be several problems. These include gas accumulating in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy as time passes, so that’s why it’s critical to book seasonal furnace maintenance with Childress Heating & AC. One of the jobs our professionals do during this work is clean your furnace’s burners. When this part gets grimy, you might hear your furnace making a loud rumbling noise when ignition takes longer than normal. The resulting gas buildup can fracture your furnace’s heat exchanger, where natural gas transforms into heat. Any fractures in it can emit carbon monoxide, which is normally released outside. This dangerous gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Childress Heating & AC advises turning it off and calling us at 540-675-4306. Too much natural gas in your furnace or a cracked heat exchanger are dangerous troubles that require prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide hot air across your home. If the ductwork wasn’t installed right or is getting dated, it can make a lot of noise when your furnace is on. This can be the issue if your furnace makes a banging noise when it shuts off. Contact Childress Heating & AC at 540-675-4306 and we’ll figure out the problem.

2. Furnace Buzzes Constantly

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 situation, 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 may hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which distributes hot or chilly air throughout your residence, and a capacitor, which triggers the motor. If either of these components are going out, they will buzz when the furnace turns on.

3. Furnace Rattles

If your furnace is making a rattling noise, it can be the result of something little, like an unsecure screw, or something serious, like a broken part. In either case, we advise shutting your furnace off and calling our heating professionals at 540-675-4306 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s attempting to get your attention it could use some TLC. If you’ve skipped furnace maintenance the last couple of years, belts could be worn down or a bearing may need to be lubed. We know that maintenance frequently slips your mind, but our pros can get your furnace running quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re noticing 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 checked your vents but are still hearing noise, Childress Heating & AC can provide support. It’s important to get loose ductwork repaired fast, because it can make comfort troubles in your home and inflate your utility expenses.

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 noise usually means there’s an issue with your furnace’s blower. Shut down your furnace off immediately and reach our professionals at 540-675-4306 for support.

When you’re hearing an uncommon noise from your furnace, Childress Heating & AC is here to support you. Contact us at 540-675-4306 to book your furnace repair appointment now.