When your furnace is operating properly, it should provide warm air without generating too much disruption. While it’s normal to notice your furnace making noise as it starts up, other disruptions are signaling your furnace should get immediate professional support.

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

1. Furnace Makes Banging or Knocking Sounds

You might have a critical problem on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it might indicate there could be a couple of problems. These range from gas increasing in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy as time passes, so that’s why it’s essential to set yearly furnace maintenance with Giordanos Heating and Air Conditioning. One of the tasks our professionals complete during this work is clean your furnace’s burners. When this piece gets grubby, you might hear your furnace making a loud rumbling noise after ignition is delayed. The resulting gas buildup might fracture your furnace’s heat exchanger, where natural gas turns into warmth. Any cracks in it can leak carbon monoxide, which is regularly emitted outdoors. This toxic gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Giordanos Heating and Air Conditioning advises turning it off and reaching us at 203-772-8319. Too much natural gas in your furnace or a ruptured heat exchanger are serious issues that should get fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to deliver hot air around your home. If the ductwork wasn’t installed correctly or is getting dated, it can be loud when your furnace is heating. This may 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 Making a Buzzing Noise

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 relies on an internal transformer to run on the proper voltage. If wires or the box isn’t tight enough, you might hear a low humming noise in the furnace when off. Your furnace also has a blower motor, which moves heated or chilly air across your rooms, and a capacitor, which starts the motor. If either of these parts are fading, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it could be due to something small, like an unfastened screw, or something critical, like a broken piece. In either case, we advise shutting your furnace off and contacting our heating pros at 203-772-8319 for support.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s trying to alert you it could use some TLC. If you’ve forgotten furnace maintenance recently, belts could be worn out or a bearing might need to be lubed. We realize that maintenance often slips your mind, but our professionals can get your furnace operating quietly again rapidly.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s likely the result of an air leak in your ductwork. You could also be aware of whistling while the furnace is working if a floor vent isn’t secure. If you’ve looked at your vents but are still noticing sound, Giordanos Heating and Air Conditioning can provide support. It’s essential to get loose ductwork fixed without delay, since it can create comfort issues in your home and inflate your utility expenses.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a good sign if you detect your furnace making a grinding noise. This metal-on-metal racket usually means there’s a problem with your furnace’s blower. Switch off your furnace off instantly and contact our pros at 203-772-8319 for help.

When you’re noticing a strange noise from your furnace, Giordanos Heating and Air Conditioning is available to provide assistance. Contact us at 203-772-8319 to schedule your furnace repair appointment right away.