When your furnace is working properly, it should give heat without generating too much sound. While it’s expected to notice your furnace making noise as it turns on, other disruptions are showing your furnace should get immediate professional help.

Here are some of the most frequent furnace noises and what they could be signaling. If your furnace is making a strange noise, our friendly heating professionals are here to fix the problem with the best furnace repair in Ballwin and St. Charles, Missouri.

1. Furnace Makes a Banging Sound

You may have a critical problem on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it can mean there could be a few problems. These involve gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system becomes dirty over the years, so that’s why it’s important to schedule routine furnace maintenance with Air Alliance Team. One of the tasks our pros do during this appointment is clean your furnace’s burners. When this part gets grimy, you may hear your furnace making a loud rumbling noise after ignition takes longer than normal. The resulting gas buildup can break your furnace’s heat exchanger, where natural gas changes into warmth. Any breaks in it can emit carbon monoxide, which is ordinarily vented away from your home. This dangerous gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Air Alliance Team recommends turning it off and reaching us at 636-206-4584. Too much natural gas in your furnace or a ruptured heat exchanger are critical issues that should get fast service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to move warm air across your home. If the ductwork wasn’t put in right or is aging, it can make a lot of noise when your furnace runs. This might be the case if your furnace makes a banging noise when it shuts off. Call Air Alliance Team at 636-206-4584 and we’ll figure out the problem.

2. Furnace Makes a Buzzing Sound

If you observe your furnace making a buzzing noise, don’t wait to call us. A buzzing sound often indicates an electrical problem, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to work on the right voltage. If wires or the box isn’t tight enough, you may detect a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves warm or cooled air throughout your rooms, and a capacitor, which turns on the motor. If either of these parts are failing, they will buzz when the furnace turns on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it could be related to something small, like a loose screw, or something major, like a broken part. In either case, we recommend shutting off your furnace and getting in touch with our heating pros at 636-206-4584 for assistance.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s making an effort 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 may need to be greased. We know that maintenance frequently slips your mind, but our technicians can get your furnace running quietly again fast.

5. Furnace Whistles

When you’re noticing your furnace making a whistling noise, it’s typically because of an air leak in your ductwork. You could also notice whistling while the furnace is on if a floor vent is loose. If you’ve checked your vents but are still noticing noise, Air Alliance Team can help. It’s important to get loose ductwork repaired without delay, because it can create comfort troubles in your residence and increase your utility costs.

6. Furnace Making a Grinding Noise

It’s not a positive sign if you hear your furnace making a grinding noise. This metal-on-metal noise frequently means there’s an issue with your furnace’s blower. Shut down your furnace off immediately and contact our pros at 636-206-4584 for assistance.

When you’re noticing an atypical noise from your furnace, Air Alliance Team is here to provide assistance. Contact us at 636-206-4584 to book your furnace repair appointment today.