When your furnace is running like it should, it should deliver warmth without creating too much disruption. While it’s expected to catch your furnace making noise as it turns on, other noises are signaling your furnace requires immediate professional assistance.

Here are some of the most common furnace noises and what they could be signaling. If your furnace is making a strange noise, our friendly heating pros are here to assist with the best furnace repair in Lawrence, Kansas.

1. Furnace Makes a Banging Sound

You may have a serious situation 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 few problems. These include gas building up in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system gets grimy over the years, so that’s why it’s important to schedule routine furnace maintenance with Scott Temperature. One of the jobs our techs complete during this service is clean your furnace’s burners. When this part gets grubby, you might hear your furnace making a loud rumbling noise when ignition is delayed. The ensuing gas buildup can break your furnace’s heat exchanger, where natural gas changes into warmth. Any breaks in it can discharge carbon monoxide, which is ordinarily vented away from your home. This toxic gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Scott Temperature advises turning it off and reaching us at 785-269-0465. Too much natural gas in your furnace or a fractured heat exchanger are hazardous issues that require prompt repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to deliver hot air across your house. If the ductwork wasn’t designed right or is aging, it can be loud when your furnace runs. This could be the issue if your furnace makes a banging noise when it shuts off. Contact Scott Temperature at 785-269-0465 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

If you observe 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 relies on an internal transformer to run on the proper voltage. If wires or the box is loose, you may notice a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves hot or cold air around your space, 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 could be due to something little, like an unfastened screw, or something major, like a broken part. In either case, we urge you to shut your furnace off and contacting our heating pros at 785-269-0465 for assistance.

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 trying to get your attention it needs some TLC. If you’ve neglected furnace maintenance the last couple of years, belts could be worn out or a bearing could need to be lubed. We are aware that maintenance sometimes slips your mind, but our professionals can get your furnace running quietly again quickly.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re detecting your furnace making a whistling noise, it’s likely due to an air leak in your ductwork. You might also be aware of whistling while the furnace is working if a floor vent isn’t secure. If you’ve checked your vents but are still hearing sound, Scott Temperature can help. It’s critical to get loose ductwork taken care of without delay, since it can create comfort problems in your home and inflate your heating expenses.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not a good sign if you detect your furnace making a grinding noise. This metal-on-metal noise frequently means there’s an issue with your furnace’s blower. Shut down your furnace off immediately and contact us at 785-269-0465 for assistance.

When you’re noticing a weird noise from your furnace, Scott Temperature is available to help. Contact us at 785-269-0465 to request your furnace repair appointment now.