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

Here are some of the most common furnace noises and what they might mean. If your furnace is making a weird noise, our friendly heating professionals are here to help with the best furnace repair in Derby, Connecticut.

1. Furnace Making a Banging Noise

You may have a serious 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 problem.

Banging Sounds Coming from Your Furnace

Your heating system gets dirty as time passes, so that’s why it’s critical to schedule annual furnace maintenance with Giordanos Heating and Air Conditioning. One of the jobs our professionals perform during this service is clean your furnace’s burners. When this part gets grubby, you might hear your furnace making a loud rumbling noise when ignition is delayed. The resulting gas buildup might crack your furnace’s heat exchanger, where natural gas transforms into warmth. Any breaks in it can leak carbon monoxide, which is regularly vented outside. This dangerous gas can be lethal in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Giordanos Heating and Air Conditioning urges you to turn it off and contacting us at 203-772-8319. Excessive natural gas in your furnace or a ruptured heat exchanger are hazardous problems that should get fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to provide hot air across your residence. If the ductwork wasn’t designed right or is getting dated, it can be loud when your furnace is on. This could be the case if your furnace makes a banging noise when it shuts off. Get in touch with Giordanos Heating and Air Conditioning at 203-772-8319 and we’ll pinpoint the problem.

2. Furnace Buzzes Constantly

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

Your furnace depends on an internal transformer to run on the correct voltage. If wires or the box isn’t tight enough, you might notice a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves hot or chilly air throughout your residence, and a capacitor, which turns on the motor. If either of these parts are failing, 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 small, like an unfastened screw, or something major, like a broken part. In either case, we recommend shutting off your furnace 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 going, it’s trying to tell you it needs some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be worn down or a bearing could need to be greased. We know that maintenance frequently slips your mind, but our pros can get your furnace running quietly again quickly.

5. Furnace Whistles

When you’re noticing your furnace making a whistling noise, it’s frequently the result of an air leak in your ductwork. You might also notice whistling while the furnace is running if a floor vent isn’t secure. If you’ve examined your vents but are still noticing noise, Giordanos Heating and Air Conditioning can provide support. It’s essential to get loose ductwork repaired without delay, as it can make comfort issues in your residence and inflate your energy expenses.

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 racket often means there’s an issue with your furnace’s blower. Shut down your furnace off immediately and contact our pros at 203-772-8319 for support.

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