When your furnace is operating correctly, it should give heat without generating too much sound. While it’s expected to hear your furnace making noise as it turns on, other disruptions are signaling your furnace requires immediate professional help.

Here are some of the most common furnace noises and what they can be indicating. If your furnace is making an odd noise, our friendly heating specialists are here to assist with the best furnace repair in Carpentersville, Illinois.

1. Furnace Making a Banging Noise

You could 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 can indicate there could be a few problems. These range from gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system becomes dirty over time, so that’s why it’s critical to set yearly furnace maintenance with Controlled Comfort HVAC. One of the jobs our technicians perform during this service is clean your furnace’s burners. When this component gets grubby, you could hear your furnace making a loud rumbling noise if ignition is delayed. The following gas buildup can break your furnace’s heat exchanger, where natural gas changes into warmth. Any fractures in it can discharge carbon monoxide, which is normally emitted outside. This dangerous gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Controlled Comfort HVAC advises turning it off and contacting us at 224-412-8308. Significant natural gas in your furnace or a broken heat exchanger are critical issues that should get immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move heated air across your home. If the ductwork wasn’t installed properly or is aging, it can make a lot of noise when your furnace is on. This could be the case if your furnace makes a banging noise when it shuts off. Contact Controlled Comfort HVAC at 224-412-8308 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

If you hear your furnace making a buzzing noise, don’t delay calling us. A buzzing sound usually means there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to operate on the proper voltage. If wires or the box is loose, you may detect a low humming noise in the furnace when off. Your furnace also has a blower motor, which distributes heated or cold air around your rooms, and a capacitor, which triggers 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 may be the result of something little, like an unsecure screw, or something critical, like a broken component. In either case, we advise shutting your furnace off and calling our heating pros at 224-412-8308 for help.

4. Furnace Squeals

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

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re detecting your furnace making a whistling noise, it’s frequently the result of an air leak in your ductwork. You could also hear whistling while the furnace is operating if a floor vent isn’t secure. If you’ve examined your vents but are still hearing whistling, Controlled Comfort HVAC can help. It’s critical to get loose ductwork repaired quickly, because it can create comfort problems in your residence and drive up your energy expenses.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal sound usually means there’s a problem with your furnace’s blower. Shut down your furnace off now and reach us at 224-412-8308 for support.

When you’re hearing an uncommon noise from your furnace, Controlled Comfort HVAC is available to help. Contact us at 224-412-8308 to book your furnace repair appointment right away.