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

Here are some of the most reported furnace noises and what they might be signaling. If your furnace is making a weird noise, our friendly heating pros are here to help with the best furnace repair in Jefferson City, Missouri.

1. Furnace Makes Banging or Knocking Sounds

You may have an urgent issue on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it may signal there could be a couple of problems. These include gas accumulating in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system becomes dirty over time, so that’s why it’s critical to schedule seasonal furnace maintenance with Stieferman Heating Company Inc. One of the jobs our technicians complete during this appointment is clean your furnace’s burners. When this part gets dirty, you might hear your furnace making a loud rumbling noise after ignition takes more time. The resulting gas buildup may fracture your furnace’s heat exchanger, where natural gas turns into warmth. Any breaks in it can emit carbon monoxide, which is ordinarily emitted outdoors. This dangerous gas can be fatal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Stieferman Heating Company Inc urges you to turn it off and contacting us at 573-635-3547. Too much natural gas in your furnace or a fractured heat exchanger are hazardous problems that require fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to move heated air around your home. If the ductwork wasn’t installed right or is aging, it can make a lot of noise when your furnace is on. This can be the issue if your furnace makes a banging noise when it shuts off. Contact Stieferman Heating Company Inc at 573-635-3547 and we’ll pinpoint the problem.

2. Furnace Makes a Buzzing Sound

If you hear your furnace making a buzzing noise, don’t delay calling us. A buzzing sound usually means there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to operate on the proper 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 distributes hot or cooled air throughout your rooms, and a capacitor, which turns on the motor. If either of these components are fading, they will buzz when the furnace starts.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it could be due to something minor, like an unfastened screw, or something critical, like a broken part. In either case, we recommend shutting off your furnace and calling our heating specialists at 573-635-3547 for support.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s trying to tell you it could use some TLC. If you’ve skipped furnace maintenance the past few years, belts could be worn out or a bearing may need to be lubed. We know that maintenance frequently slips your mind, but our professionals can get your furnace heating quietly again quickly.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re noticing your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You may also hear whistling while the furnace is on if a floor vent isn’t tight. If you’ve looked at your vents but are still sensing whistling, Stieferman Heating Company Inc can help. It’s critical to get loose ductwork taken care of fast, because it can result in comfort troubles in your house and drive up your gas expenses.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a positive 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. Shut down your furnace off now and contact us at 573-635-3547 for support.

When you’re getting a weird noise from your furnace, Stieferman Heating Company Inc is here to support you. Contact us at 573-635-3547 to book your furnace repair appointment now.