When your furnace is operating like it should, it should provide heat without making too much disruption. While it’s normal to notice your furnace making noise as it begins running, other disruptions are showing your furnace needs immediate professional support.

Here are some of the most reported furnace noises and what they might be indicating. If your furnace is making a strange noise, our friendly heating specialists are here to fix the problem with the best furnace repair in Manassas, Virginia.

1. Furnace Makes a Banging Sound

You may have a serious problem on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it might indicate there could be several problems. These range from gas building up in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns dirty over time, so that’s why it’s essential to schedule routine furnace maintenance with Woody's Sudden Service. One of the tasks our pros complete during this appointment is clean your furnace’s burners. When this piece gets dirty, you might hear your furnace making a loud rumbling noise when ignition takes more time. The subsequent gas buildup may crack your furnace’s heat exchanger, where natural gas turns into heat. Any fractures in it can leak carbon monoxide, which is regularly emitted outdoors. This hazardous gas can be lethal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Woody's Sudden Service advises turning it off and reaching us at 703-278-2036. Excessive natural gas in your furnace or a cracked heat exchanger are serious issues that should get fast attention.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to provide warm air across your house. If the ductwork wasn’t designed right or is aging, it can be loud when your furnace runs. This might be the case if your furnace makes a banging noise when it shuts off. Contact Woody's Sudden Service at 703-278-2036 and we’ll determine 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 often indicates an electrical problem, 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 is loose, you might hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves hot or cooled air across your rooms, and a capacitor, which starts the motor. If either of these components are fading, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it could be the result of something small, like an unsecure screw, or something major, like a broken part. In either case, we advise shutting your furnace off and getting in touch with our heating pros at 703-278-2036 for support.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s making an effort to tell you it needs some TLC. If you’ve skipped furnace maintenance recently, belts could be worn down or a bearing might need to be lubricated. We realize that maintenance sometimes slips your mind, but our technicians can get your furnace running quietly again fast.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s typically the result of an air leak in your ductwork. You could 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 sensing sound, Woody's Sudden Service can help. It’s critical to get loose ductwork repaired fast, as it can result in comfort problems in your house and drive up your heating expenses.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not an encouraging sign if you detect your furnace making a grinding noise. This metal-on-metal noise typically means there’s an issue with your furnace’s blower. Shut down your furnace off right away and contact us at 703-278-2036 for assistance.

When you’re getting an uncommon noise from your furnace, Woody's Sudden Service is available to help. Contact us at 703-278-2036 to book your furnace repair appointment today.