When your furnace is working properly, it should provide heat without making too much noise. While it’s normal to notice your furnace making noise as it turns on, other noises are showing your furnace should get 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 fix the problem with the best furnace repair in Shamokin and Sunbury, Pennsylvania.

1. Furnace Makes a Banging Sound

You may have a critical situation on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it may indicate there could be several problems. These involve gas building up in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system becomes filthy over time, so that’s why it’s important to schedule yearly furnace maintenance with LTS Plumbing & Heating Inc.. One of the jobs our professionals perform during this appointment is clean your furnace’s burners. When this component gets grubby, you might hear your furnace making a loud rumbling noise after ignition takes longer than normal. The resulting gas buildup may break your furnace’s heat exchanger, where natural gas turns into warmth. Any fractures in it can emit carbon monoxide, which is regularly released outside. This toxic gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, LTS Plumbing & Heating Inc. recommends turning it off and calling us at 570-648-0748. Too much natural gas in your furnace or a cracked heat exchanger are dangerous problems that should get immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to provide heated air throughout your home. If the ductwork wasn’t designed right or is aging, it can be noisy when your furnace runs. This can be the case if your furnace makes a banging noise when it shuts off. Get in touch with LTS Plumbing & Heating Inc. at 570-648-0748 and we’ll figure out the problem.

2. Furnace Buzzes Constantly

If you hear your furnace making a buzzing noise, don’t delay calling us. A buzzing sound often indicates an electrical situation, 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 could hear a low humming noise in the furnace when off. Your furnace also uses a blower motor, which moves heated or cold air across your house, and a capacitor, which turns on the motor. If either of these components are fading, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it can be the result of something small, like an unfastened screw, or something critical, like a broken component. In either case, we advise shutting your furnace off and contacting our heating pros at 570-648-0748 for support.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s making an effort to tell you it could use some TLC. If you’ve skipped furnace maintenance the last couple of years, belts could be worn down or a bearing could need to be lubricated. We realize that maintenance frequently slips your mind, but our pros can get your furnace heating quietly again rapidly.

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 may also notice whistling while the furnace is working if a floor vent is loose. If you’ve checked your vents but are still noticing noise, LTS Plumbing & Heating Inc. can help. It’s important to get loose ductwork fixed quickly, as it can result in comfort troubles in your residence and inflate your energy bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a good sign if you notice your furnace making a grinding noise. This metal-on-metal sound typically means there’s an issue with your furnace’s blower. Shut down your furnace off instantly and reach our professionals at 570-648-0748 for assistance.

When you’re hearing an atypical noise from your furnace, LTS Plumbing & Heating Inc. is here to support you. Contact us at 570-648-0748 to schedule your furnace repair appointment today.