When your furnace is operating like it should, it should give heat without generating too much sound. While it’s common to hear your furnace making noise as it turns on, other disruptions are showing your furnace needs immediate professional support.

Here are some of the most common furnace noises and what they can be signaling. If your furnace is making an atypical 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 might have a serious situation on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it may indicate there could be a few problems. These include gas increasing in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system gets filthy over the years, so that’s why it’s important to set seasonal furnace maintenance with Woody's Sudden Service. One of the tasks our technicians complete during this appointment is clean your furnace’s burners. When this part gets dirty, you might hear your furnace making a loud rumbling noise if ignition takes longer than normal. The ensuing gas buildup can fracture your furnace’s heat exchanger, where natural gas transforms into warm air. Any cracks in it can emit carbon monoxide, which is regularly emitted away from your home. This dangerous gas can be fatal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Woody's Sudden Service recommends turning it off and calling us at 703-278-2036. Excessive natural gas in your furnace or a ruptured heat exchanger are hazardous problems that require fast service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide warm air around your house. If the ductwork wasn’t installed properly or is getting old, it can be noisy when your furnace is on. This may be the problem if your furnace makes a banging noise when it shuts off. Call Woody's Sudden Service at 703-278-2036 and we’ll figure out the problem.

2. Furnace Buzzes Constantly

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

Your furnace depends on an internal transformer to run on the proper voltage. If wires or the box isn’t tight enough, you may notice a low humming noise in the furnace when off. Your furnace also uses a blower motor, which moves warm or cooled air across your space, and a capacitor, which starts the motor. If either of these components 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 can be due to something minor, like an unsecure screw, or something serious, like a broken component. In either case, we urge you to shut your furnace off and getting in touch with our heating specialists at 703-278-2036 for support.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s trying to tell you it needs some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be worn down or a bearing could need to be greased. We realize that maintenance sometimes slips your mind, but our professionals can get your furnace heating quietly again fast.

5. Furnace Whistles

When you’re hearing your furnace making a whistling noise, it’s frequently due to an air leak in your ductwork. You may also be aware of whistling while the furnace is on if a floor vent is loose. If you’ve examined your vents but are still noticing noise, Woody's Sudden Service can assist you. It’s essential to get loose ductwork repaired quickly, since it can result in comfort issues in your home and increase your gas expenses.

6. Furnace Making a Grinding Noise

It’s not a good sign if you hear your furnace making a grinding noise. This metal-on-metal noise typically means there’s a problem with your furnace’s blower. Switch off your furnace off immediately and reach us at 703-278-2036 for support.

When you’re noticing an atypical noise from your furnace, Woody's Sudden Service is available to provide assistance. Contact us at 703-278-2036 to book your furnace repair appointment now.