When your furnace is working correctly, it should provide warm air without creating too much noise. While it’s common to hear your furnace making noise as it starts up, other disruptions are signaling your furnace needs immediate professional assistance.

Here are some of the most common furnace noises and what they can be indicating. If your furnace is making a weird noise, our friendly heating pros are here to assist with the best furnace repair in Manassas, Virginia.

1. Furnace Makes a Banging Sound

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

Banging Sounds Coming from Your Furnace

Your heating system becomes grimy as time passes, so that’s why it’s important to schedule seasonal furnace maintenance with Fire & Ice HVAC. One of the jobs our technicians do during this service is clean your furnace’s burners. When this component gets grimy, you could hear your furnace making a loud rumbling noise if ignition takes more time. The following gas buildup may break your furnace’s heat exchanger, where natural gas transforms into heat. Any breaks in it can discharge carbon monoxide, which is regularly released outside. This toxic gas can be lethal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Fire & Ice HVAC urges you to turn it off and calling us at 703-595-4157. Significant natural gas in your furnace or a fractured heat exchanger are critical problems that necessitate immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to deliver heated air across your home. If the ductwork wasn’t installed properly or is getting old, it can be loud when your furnace runs. This can be the issue if your furnace makes a banging noise when it shuts off. Call Fire & Ice HVAC at 703-595-4157 and we’ll figure out the problem.

2. Furnace Buzzes Constantly

If you observe your furnace making a buzzing noise, don’t hesitate 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 operate on the proper voltage. If wires or the box is loose, you might detect a low humming noise in the furnace when off. Your furnace also uses a blower motor, which distributes heated or chilly air around your home, and a capacitor, which turns on 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 can be due to something small, like a loose screw, or something serious, like a broken piece. In either case, we recommend shutting off your furnace and contacting our heating pros at 703-595-4157 for help.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s attempting to tell you it could use some TLC. If you’ve neglected furnace maintenance recently, belts could be worn out or a bearing may need to be greased. We know that maintenance sometimes slips your mind, but our techs can get your furnace heating quietly again fast.

5. Furnace Whistles

When you’re detecting your furnace making a whistling noise, it’s typically because of an air leak in your ductwork. You could also be aware of whistling while the furnace is working if a floor vent is loose. If you’ve examined your vents but are still sensing noise, Fire & Ice HVAC can provide support. It’s important to get loose ductwork fixed without delay, since it can create comfort troubles in your house and inflate your heating costs.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not an encouraging sign if you detect your furnace making a grinding noise. This metal-on-metal racket frequently means there’s trouble with your furnace’s blower. Switch off your furnace off immediately and reach us at 703-595-4157 for assistance.

When you’re getting a strange noise from your furnace, Fire & Ice HVAC is ready to help. Contact us at 703-595-4157 to schedule your furnace repair appointment today.