When your furnace is running like it should, it should give warm air without generating too much sound. While it’s common to catch your furnace making noise as it starts up, other noises are showing your furnace needs immediate professional assistance.

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

1. Furnace Makes a Banging Sound

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

Banging Sounds Coming from Your Furnace

Your heating system becomes filthy over the years, so that’s why it’s important to book seasonal furnace maintenance with Controlled Comfort HVAC. One of the things our techs perform during this work is clean your furnace’s burners. When this piece gets grubby, you might hear your furnace making a loud rumbling noise if ignition takes more time. The subsequent gas buildup may fracture your furnace’s heat exchanger, where natural gas turns into warm air. Any cracks in it can discharge carbon monoxide, which is ordinarily emitted outdoors. This hazardous gas can be fatal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Controlled Comfort HVAC recommends turning it off and contacting us at 224-412-8308. Too much natural gas in your furnace or a cracked heat exchanger are dangerous issues that necessitate prompt repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide hot air across your house. If the ductwork wasn’t installed properly or is aging, it can be loud when your furnace is on. This may be the problem if your furnace makes a banging noise when it shuts off. Call Controlled Comfort HVAC at 224-412-8308 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 problem, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to run on the proper voltage. If wires or the box isn’t tight enough, you may hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which distributes warm or chilly air throughout your home, and a capacitor, which starts the motor. If either of these components are failing, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it may be related to something little, like an unsecure screw, or something major, like a broken part. In either case, we urge you to shut your furnace off and contacting our heating professionals at 224-412-8308 for assistance.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s making an effort 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 lubricated. We are aware that maintenance sometimes slips your mind, but our professionals can get your furnace operating quietly again quickly.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re hearing your furnace making a whistling noise, it’s likely due to an air leak in your ductwork. You might also notice whistling while the furnace is working if a floor vent isn’t secure. If you’ve checked your vents but are still hearing sound, Controlled Comfort HVAC can provide support. It’s important to get loose ductwork fixed without delay, as it can result in comfort troubles in your home and inflate your gas expenses.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a good sign if you notice your furnace making a grinding noise. This metal-on-metal racket typically means there’s a problem with your furnace’s blower. Shut down your furnace off immediately and contact us at 224-412-8308 for assistance.

When you’re noticing a strange noise from your furnace, Controlled Comfort HVAC is ready to support you. Contact us at 224-412-8308 to book your furnace repair appointment today.