When your furnace is working like it should, it should provide warmth without generating too much disruption. While it’s common to notice your furnace making noise as it begins running, other sounds are indicating your furnace should get immediate professional assistance.

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

1. Furnace Making a Banging Noise

You may 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 may indicate there could be several problems. These include gas accumulating in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system turns filthy over time, so that’s why it’s essential to set routine furnace maintenance with B & B Heating & Cooling. One of the things our technicians do during this service is clean your furnace’s burners. When this part gets dirty, you may hear your furnace making a loud rumbling noise after ignition takes more time. The following gas buildup may crack your furnace’s heat exchanger, where natural gas changes into warm air. Any breaks in it can discharge carbon monoxide, which is ordinarily released away from your home. This dangerous gas can be lethal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, B & B Heating & Cooling urges you to turn it off and calling us at 314-325-7552. Too much natural gas in your furnace or a fractured heat exchanger are dangerous issues that should get fast attention.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide warm air throughout your house. If the ductwork wasn’t put in right or is getting dated, it can make a lot of noise when your furnace is heating. This could be the issue if your furnace makes a banging noise when it shuts off. Call B & B Heating & Cooling at 314-325-7552 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 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 is loose, you could hear a low humming noise in the furnace when off. Your furnace also uses a blower motor, which moves heated or cold air around your rooms, and a capacitor, which turns on the motor. If either of these pieces are going out, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it could be the result of something small, like an unsecure screw, or something major, like a broken component. In either case, we advise shutting your furnace off and contacting our heating pros at 314-325-7552 for help.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s trying to tell you it could use some TLC. If you’ve skipped furnace maintenance recently, belts could be worn out or a bearing might need to be lubed. We are aware that maintenance often slips your mind, but our professionals can get your furnace heating quietly again quickly.

5. Furnace Whistles

When you’re detecting your furnace making a whistling noise, it’s frequently due to an air leak in your ductwork. You might also hear whistling while the furnace is working if a floor vent isn’t secure. If you’ve examined your vents but are still sensing whistling, B & B Heating & Cooling can provide support. It’s essential to get loose ductwork repaired without delay, because it can create comfort problems in your house and drive up your energy costs.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a good sign if you notice your furnace making a grinding noise. This metal-on-metal noise usually means there’s a problem with your furnace’s blower. Switch off your furnace off promptly and contact us at 314-325-7552 for help.

When you’re hearing a strange noise from your furnace, B & B Heating & Cooling is available to support you. Contact us at 314-325-7552 to schedule your furnace repair appointment today.