When your furnace is operating like it should, it should provide heat without making too much sound. While it’s expected to catch your furnace making noise as it starts up, other disruptions are indicating your furnace needs immediate professional assistance.

Here are some of the most frequent furnace noises and what they can mean. If your furnace is making a weird noise, our friendly heating professionals are here to help with the best furnace repair in Manassas, Virginia.

1. Furnace Makes a Banging Sound

You may 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 might indicate there could be a couple of problems. These include gas accumulating in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system becomes dirty over time, so that’s why it’s essential to book routine furnace maintenance with Woody's Sudden Service. One of the jobs our pros complete during this appointment is clean your furnace’s burners. When this part gets grimy, you might hear your furnace making a loud rumbling noise after ignition is delayed. The following gas buildup can break your furnace’s heat exchanger, where natural gas transforms into warmth. Any fractures in it can emit carbon monoxide, which is normally released away from your home. This dangerous gas can be lethal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Woody's Sudden Service advises turning it off and calling us at 703-278-2036. Too much natural gas in your furnace or a fractured heat exchanger are dangerous troubles that should get immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide hot air across your home. If the ductwork wasn’t installed properly or is getting dated, it can make a lot of noise when your furnace is on. This might be the case if your furnace makes a banging noise when it shuts off. Call Woody's Sudden Service at 703-278-2036 and we’ll determine the problem.

2. Furnace Buzzes Constantly

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

Your furnace relies on an internal transformer to operate on the proper voltage. If wires or the box needs to be tightened, you could notice a low humming noise in the furnace when off. Your furnace also works with a blower motor, which sends heated or cooled air around your rooms, and a capacitor, which triggers the motor. If either of these pieces are failing, they will buzz when the furnace starts.

3. Furnace Rattles

If your furnace is making a rattling noise, it could be related to something minor, like an unsecure screw, or something serious, like a broken component. In either case, we recommend shutting off your furnace and contacting our heating specialists at 703-278-2036 for support.

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 neglected furnace maintenance the last couple of years, belts could be worn down or a bearing might need to be lubricated. We realize that maintenance sometimes slips your mind, but our pros can get your furnace heating quietly again rapidly.

5. Furnace Whistles

When you’re noticing your furnace making a whistling noise, it’s frequently because of an air leak in your ductwork. You might also notice whistling while the furnace is operating if a floor vent is loose. If you’ve checked your vents but are still sensing whistling, Woody's Sudden Service can help. It’s critical to get loose ductwork fixed without delay, because it can make comfort problems in your residence and drive up your gas expenses.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you notice your furnace making a grinding noise. This metal-on-metal sound typically means there’s trouble with your furnace’s blower. Shut down your furnace off right away and contact our professionals at 703-278-2036 for support.

When you’re getting an uncommon noise from your furnace, Woody's Sudden Service is here to provide assistance. Contact us at 703-278-2036 to request your furnace repair appointment now.