When your furnace is running correctly, it should give heat without generating too much noise. While it’s normal to catch your furnace making noise as it turns on, other sounds are signaling your furnace should get immediate professional support.

Here are some of the most reported furnace noises and what they can mean. If your furnace is making an atypical noise, our friendly heating pros are here to help with the best furnace repair in Ballwin and St. Charles, Missouri.

1. Furnace Making a Banging Noise

You might have a serious issue on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it can signal there could be several problems. These involve gas increasing in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system gets filthy as time passes, so that’s why it’s critical to schedule yearly furnace maintenance with Air Alliance Team. One of the jobs our techs complete during this service is clean your furnace’s burners. When this component gets grubby, you might hear your furnace making a loud rumbling noise if ignition takes more time. The subsequent gas buildup can fracture your furnace’s heat exchanger, where natural gas changes into warmth. Any fractures in it can leak carbon monoxide, which is normally emitted outside. This dangerous gas can be fatal in large concentrations.

If you’re aware of 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 broken heat exchanger are serious issues that require immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide heated air throughout your home. If the ductwork wasn’t put in right or is aging, it can be loud when your furnace runs. This can be the problem if your furnace makes a banging noise when it shuts off. Call Air Alliance Team at 636-206-4584 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

If you hear your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound frequently indicates an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to operate on the correct voltage. If wires or the box isn’t tight enough, you could detect a low humming noise in the furnace when off. Your furnace also works with a blower motor, which distributes warm or cooled air throughout your rooms, and a capacitor, which triggers the motor. If either of these components are failing, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it could be related to something little, like an unsecure screw, or something serious, like a broken component. In either case, we recommend shutting off your furnace and calling our heating professionals at 636-206-4584 for help.

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 alert you it could use some TLC. If you’ve forgotten furnace maintenance the past few years, belts could be worn out or a bearing may need to be lubricated. We realize that maintenance often slips your mind, but our professionals can get your furnace running quietly again rapidly.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s frequently the result of an air leak in your ductwork. You might also hear whistling while the furnace is working if a floor vent isn’t tight. If you’ve looked at your vents but are still noticing whistling, Air Alliance Team can provide support. It’s essential to get loose ductwork taken care of without delay, since it can make comfort issues in your home and increase your energy expenses.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not an encouraging sign if you hear your furnace making a grinding noise. This metal-on-metal sound usually means there’s trouble with your furnace’s blower. Switch off your furnace off now and call our pros at 636-206-4584 for help.

When you’re noticing an atypical noise from your furnace, Air Alliance Team is available to help. Contact us at 636-206-4584 to schedule your furnace repair appointment right away.