Banging, Screeching and Rattling: What Six Typical Furnace Noises Indicate

When your furnace is operating like it should, it should deliver heat without generating too much disruption. While it’s expected to notice your furnace making noise as it turns on, other noises are indicating 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 an atypical noise, our friendly heating professionals are here to help with the best furnace repair in Pflugerville, Texas.

1. Furnace Making a Banging Noise

You might have an urgent problem on your hands if you’re noticing 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 range from gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system gets dirty over the years, so that’s why it’s important to set seasonal furnace maintenance with Evenaire Heating & Air Conditioning. One of the tasks our technicians do during this work is clean your furnace’s burners. When this piece gets grubby, you may hear your furnace making a loud rumbling noise if ignition takes longer than normal. The following gas buildup might crack your furnace’s heat exchanger, where natural gas changes into warmth. Any cracks in it can emit carbon monoxide, which is regularly vented away from your home. This hazardous gas can be lethal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Evenaire Heating & Air Conditioning recommends turning it off and contacting us at 512-355-1482. Significant natural gas in your furnace or a broken heat exchanger are serious issues that should get immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to deliver hot air across your home. If the ductwork wasn’t installed correctly or is aging, it can be loud when your furnace is heating. This may be the case if your furnace makes a banging noise when it shuts off. Get in touch with Evenaire Heating & Air Conditioning at 512-355-1482 and we’ll pinpoint the problem.

2. Furnace Making a Buzzing Noise

If you notice your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound usually means there’s an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to operate on the proper voltage. If wires or the box needs to be tightened, you might hear a low humming noise in the furnace when off. Your furnace also has a blower motor, which moves hot or chilly air across your home, and a capacitor, which triggers the motor. If either of these components are going out, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it can be due to something minor, like an unsecure screw, or something major, like a broken component. In either case, we urge you to shut your furnace off and getting in touch with our heating professionals at 512-355-1482 for help.

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 could use some TLC. If you’ve skipped furnace maintenance recently, belts could be worn down or a bearing may need to be greased. We know that maintenance sometimes slips your mind, but our technicians can get your furnace operating quietly again fast.

5. Furnace Making a Whistling Noise

When you’re noticing your furnace making a whistling noise, it’s typically due to an air leak in your ductwork. You could also hear whistling while the furnace is operating if a floor vent is loose. If you’ve examined your vents but are still noticing sound, Evenaire Heating & Air Conditioning can provide support. It’s important to get loose ductwork fixed quickly, since it can result in comfort troubles in your home and drive up your energy bills.

6. Furnace Making a Grinding Noise

It’s not a good sign if you hear your furnace making a grinding noise. This metal-on-metal sound frequently means there’s an issue with your furnace’s blower. Shut down your furnace off instantly and call our pros at 512-355-1482 for assistance.

When you’re hearing an uncommon noise from your furnace, Evenaire Heating & Air Conditioning is ready to help. Contact us at 512-355-1482 to schedule your furnace repair appointment now.