When your furnace is operating properly, it should deliver warmth without creating too much sound. While it’s normal to catch your furnace making noise as it begins running, other noises are signaling your furnace requires immediate professional assistance.

Here are some of the most common furnace noises and what they might be indicating. If your furnace is making a weird noise, our friendly heating specialists are here to help with the best furnace repair in Seymour, Wisconsin.

1. Furnace Makes Banging or Knocking Sounds

You could have a critical problem on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it might mean there could be a few problems. These include gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system becomes grimy over the years, so that’s why it’s important to book yearly furnace maintenance with Diedrick's Heating and Air Conditioning. One of the jobs our techs complete during this service is clean your furnace’s burners. When this part gets dirty, you might hear your furnace making a loud rumbling noise if ignition is delayed. The resulting gas buildup might fracture your furnace’s heat exchanger, where natural gas transforms into heat. Any cracks in it can leak carbon monoxide, which is ordinarily emitted outdoors. This toxic gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Diedrick's Heating and Air Conditioning urges you to turn it off and contacting us at 920-833-7967. Significant natural gas in your furnace or a ruptured heat exchanger are dangerous problems that necessitate immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide warm air around your residence. If the ductwork wasn’t installed properly or is getting dated, it can be noisy when your furnace is heating. This can be the case if your furnace makes a banging noise when it shuts off. Call Diedrick's Heating and Air Conditioning at 920-833-7967 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

If you observe your furnace making a buzzing noise, don’t hesitate to call 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 run on the right voltage. If wires or the box isn’t tight enough, you may hear a low humming noise in the furnace when off. Your furnace also has a blower motor, which moves warm or cold air around your residence, and a capacitor, which starts the motor. If either of these parts are fading, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it may be due to something little, like a loose screw, or something serious, like a broken part. In either case, we urge you to shut your furnace off and calling our heating specialists at 920-833-7967 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s trying to get your attention it could use some TLC. If you’ve skipped 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 professionals can get your furnace heating quietly again rapidly.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re hearing 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 working if a floor vent isn’t secure. If you’ve checked your vents but are still noticing noise, Diedrick's Heating and Air Conditioning can assist you. It’s critical to get loose ductwork taken care of quickly, since it can make comfort issues in your residence and increase your heating 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 racket typically means there’s a problem with your furnace’s blower. Switch off your furnace off immediately and contact our professionals at 920-833-7967 for support.

When you’re noticing an uncommon noise from your furnace, Diedrick's Heating and Air Conditioning is available to provide assistance. Contact us at 920-833-7967 to book your furnace repair appointment now.