When your furnace is working correctly, it should provide warm air without creating too much sound. While it’s common to hear your furnace making noise as it begins running, other noises are signaling your furnace requires immediate professional support.

Here are some of the most common furnace noises and what they can be signaling. If your furnace is making a strange noise, our friendly heating specialists are here to help with the best furnace repair in Derby, Connecticut.

1. Furnace Makes Banging or Knocking Sounds

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

Banging Sounds Coming from Your Furnace

Your heating system turns dirty over time, so that’s why it’s critical to schedule seasonal furnace maintenance with Giordanos Heating and Air Conditioning. One of the things our technicians complete during this appointment is clean your furnace’s burners. When this piece gets grubby, you could hear your furnace making a loud rumbling noise when ignition is delayed. The subsequent gas buildup can break your furnace’s heat exchanger, where natural gas changes into heat. Any fractures in it can leak carbon monoxide, which is regularly emitted outdoors. This dangerous gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Giordanos Heating and Air Conditioning urges you to turn it off and reaching us at 203-772-8319. Too much natural gas in your furnace or a cracked heat exchanger are critical issues that should get fast attention.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to deliver warm air around your house. If the ductwork wasn’t designed correctly or is getting old, it can make a lot of noise when your furnace is heating. This could be the case if your furnace makes a banging noise when it shuts off. Call Giordanos Heating and Air Conditioning at 203-772-8319 and we’ll determine the problem.

2. Furnace Makes a Buzzing Sound

If you hear your furnace making a buzzing noise, don’t wait to call us. A buzzing sound usually indicates an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to work on the proper voltage. If wires or the box is loose, you may hear a low humming noise in the furnace when off. Your furnace also uses a blower motor, which distributes heated or cold air throughout your rooms, and a capacitor, which starts the motor. If either of these parts are fading, they will buzz when the furnace turns on.

3. Furnace Makes Rattling Sounds Like Something Is Loose

If your furnace is making a rattling noise, it could be related to something minor, like an unsecure screw, or something major, like a broken piece. In either case, we advise shutting your furnace off and getting in touch with our heating pros at 203-772-8319 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 get your attention it could use some TLC. If you’ve forgotten furnace maintenance the past few years, belts could be worn out or a bearing could need to be lubricated. We realize that maintenance sometimes slips your mind, but our techs can get your furnace heating quietly again fast.

5. Furnace Whistles

When you’re detecting your furnace making a whistling noise, it’s typically the result of an air leak in your ductwork. You could also hear whistling while the furnace is operating if a floor vent isn’t tight. If you’ve examined your vents but are still sensing whistling, Giordanos Heating and Air Conditioning can assist you. It’s critical to get loose ductwork fixed without delay, as it can result in comfort issues in your residence and increase your utility bills.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you detect 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 instantly and reach our pros at 203-772-8319 for assistance.

When you’re hearing an uncommon noise from your furnace, Giordanos Heating and Air Conditioning is available to support you. Contact us at 203-772-8319 to book your furnace repair appointment today.