When your furnace is operating correctly, it should deliver warm air without making too much sound. While it’s common to hear your furnace making noise as it starts up, other sounds are showing your furnace requires immediate professional support.

Here are some of the most reported furnace noises and what they could be signaling. If your furnace is making a strange noise, our friendly heating specialists are here to assist with the best furnace repair in Saint Louis, Missouri.

1. Furnace Making a Banging Noise

You could have an urgent situation on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it can signal there could be a few problems. These include gas increasing in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system gets dirty over time, so that’s why it’s essential to schedule routine furnace maintenance with Morgner Inc. Air Conditioning & Heating. One of the things our professionals complete during this appointment is clean your furnace’s burners. When this piece gets dirty, you could hear your furnace making a loud rumbling noise after ignition is delayed. The following gas buildup can fracture your furnace’s heat exchanger, where natural gas turns into warm air. Any fractures in it can emit carbon monoxide, which is normally emitted away from your home. This toxic gas can be lethal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Morgner Inc. Air Conditioning & Heating recommends turning it off and contacting us at 314-262-4541. Too much natural gas in your furnace or a fractured heat exchanger are dangerous troubles that require prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to provide warm air throughout your residence. If the ductwork wasn’t put in properly or is aging, it can be noisy when your furnace runs. This might be the problem if your furnace makes a banging noise when it shuts off. Contact Morgner Inc. Air Conditioning & Heating at 314-262-4541 and we’ll figure out the problem.

2. Furnace Makes a Buzzing Sound

If you notice your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound typically is telling you there’s an electrical issue, 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 needs to be tightened, you could hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves warm or chilly air across your house, and a capacitor, which turns on the motor. If either of these pieces are going out, they will buzz when the furnace turns on.

3. Furnace Rattles

If your furnace is making a rattling noise, it could be related to something little, like a loose screw, or something serious, like a broken part. In either case, we advise shutting your furnace off and contacting our heating pros at 314-262-4541 for support.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s making an effort to get your attention it requires some TLC. If you’ve forgotten furnace maintenance the past few years, belts could be worn out or a bearing may need to be lubed. We are aware that maintenance frequently slips your mind, but our techs can get your furnace operating quietly again rapidly.

5. Furnace Whistles

When you’re detecting your furnace making a whistling noise, it’s typically the result of an air leak in your ductwork. You might also hear whistling while the furnace is operating if a floor vent isn’t tight. If you’ve checked your vents but are still sensing noise, Morgner Inc. Air Conditioning & Heating can help. It’s important to get loose ductwork repaired quickly, as it can make comfort issues in your residence and inflate your utility costs.

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 racket usually means there’s trouble with your furnace’s blower. Turn off your furnace off now and reach us at 314-262-4541 for help.

When you’re noticing a strange noise from your furnace, Morgner Inc. Air Conditioning & Heating is available to help. Contact us at 314-262-4541 to schedule your furnace repair appointment now.