When your furnace is running properly, it should provide warmth without making too much sound. While it’s common to hear your furnace making noise as it begins running, other noises are showing your furnace requires immediate professional support.

Here are some of the most frequent furnace noises and what they can be signaling. If your furnace is making a strange noise, our friendly heating pros are here to fix the problem with the best furnace repair in Omaha, Nebraska.

1. Furnace Making a Banging Noise

You could have a critical issue on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it might mean there could be a couple of problems. These include gas building up in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy over the years, so that’s why it’s essential to set annual furnace maintenance with Interstate Heating & Air Conditioning. One of the jobs our techs complete during this service is clean your furnace’s burners. When this piece gets grimy, you may hear your furnace making a loud rumbling noise if ignition is delayed. The following gas buildup might crack your furnace’s heat exchanger, where natural gas changes into warmth. Any cracks in it can leak carbon monoxide, which is regularly vented outside. This hazardous gas can be lethal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Interstate Heating & Air Conditioning recommends turning it off and contacting us at 402-509-5940. Too much natural gas in your furnace or a cracked heat exchanger are serious problems that require immediate attention.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide warm air around your house. If the ductwork wasn’t installed properly or is getting old, it can be noisy when your furnace runs. This might be the case if your furnace makes a banging noise when it shuts off. Get in touch with Interstate Heating & Air Conditioning at 402-509-5940 and we’ll determine the problem.

2. Furnace Buzzes Constantly

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

Your furnace uses an internal transformer to work on the right voltage. If wires or the box is loose, you could notice a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves warm or cold air across your space, and a capacitor, which starts the motor. If either of these parts 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 due to something minor, like an unfastened screw, or something major, like a broken part. In either case, we advise shutting your furnace off and contacting our heating pros at 402-509-5940 for help.

4. Furnace Is Making a High-Pitched Squealing Sound

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s attempting to alert you it requires some TLC. If you’ve skipped furnace maintenance the past few years, belts could be worn down or a bearing may need to be lubricated. We are aware that maintenance sometimes slips your mind, but our pros can get your furnace heating quietly again quickly.

5. Furnace Whistles

When you’re noticing 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 running if a floor vent isn’t tight. If you’ve looked at your vents but are still hearing sound, Interstate Heating & Air Conditioning can provide support. It’s essential to get loose ductwork repaired without delay, as it can result in comfort issues in your house and drive up your energy bills.

6. Furnace Makes Noise that Sounds Like Scraping Metal

It’s not an encouraging sign if you notice your furnace making a grinding noise. This metal-on-metal noise often means there’s an issue with your furnace’s blower. Turn off your furnace off immediately and contact us at 402-509-5940 for support.

When you’re getting a weird noise from your furnace, Interstate Heating & Air Conditioning is here to help. Contact us at 402-509-5940 to schedule your furnace repair appointment now.