When your furnace is working properly, it should deliver warm air without generating too much disruption. While it’s expected to notice your furnace making noise as it begins running, other noises are showing your furnace needs immediate professional assistance.

Here are some of the most reported furnace noises and what they can be signaling. If your furnace is making an odd noise, our friendly heating specialists are here to fix the problem with the best furnace repair in Lincoln, Nebraska.

1. Furnace Makes a Banging Sound

You might have a serious problem on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it might signal there could be several problems. These include gas accumulating in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system becomes grimy as time passes, so that’s why it’s important to set yearly furnace maintenance with AW Heating & Air Conditioning. One of the things our techs do during this appointment is clean your furnace’s burners. When this component gets dirty, you may hear your furnace making a loud rumbling noise when ignition takes more time. The resulting gas buildup might crack your furnace’s heat exchanger, where natural gas turns into heat. Any fractures in it can discharge carbon monoxide, which is regularly vented outside. This toxic gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, AW Heating & Air Conditioning advises turning it off and calling us at 402-438-7992. Excessive natural gas in your furnace or a ruptured heat exchanger are serious problems that require immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move heated air across your home. If the ductwork wasn’t installed correctly or is getting old, it can be loud when your furnace runs. This can be the problem if your furnace makes a banging noise when it shuts off. Call AW Heating & Air Conditioning at 402-438-7992 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

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

Your furnace relies on an internal transformer to run on the right voltage. If wires or the box is loose, you might notice a low humming noise in the furnace when off. Your furnace also uses a blower motor, which sends hot or cooled air around your home, and a capacitor, which turns on the motor. If either of these components are going out, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it may be related to something little, like an unsecure screw, or something major, like a broken piece. In either case, we urge you to shut your furnace off and calling our heating specialists at 402-438-7992 for help.

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 get your attention it needs some TLC. If you’ve forgotten furnace maintenance the past few years, belts could be worn out or a bearing could need to be greased. We know that maintenance frequently slips your mind, but our techs can get your furnace operating 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 could also be aware of 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, AW Heating & Air Conditioning can provide support. It’s important to get loose ductwork repaired without delay, because it can make comfort issues in your home and inflate your gas bills.

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 racket frequently means there’s a problem with your furnace’s blower. Turn off your furnace off now and call us at 402-438-7992 for assistance.

When you’re hearing a weird noise from your furnace, AW Heating & Air Conditioning is available to help. Contact us at 402-438-7992 to request your furnace repair appointment now.