When your furnace is running like it should, it should provide warm air without making too much disruption. While it’s normal to catch your furnace making noise as it begins running, other disruptions are signaling your furnace requires immediate professional assistance.

Here are some of the most common furnace noises and what they could mean. If your furnace is making an atypical noise, our friendly heating specialists are here to assist with the best furnace repair in Derby, Connecticut.

1. Furnace Makes Banging or Knocking Sounds

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 increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system becomes filthy over time, so that’s why it’s critical to book routine furnace maintenance with Giordanos Heating and Air Conditioning. One of the tasks our technicians complete during this work is clean your furnace’s burners. When this part gets grubby, you may hear your furnace making a loud rumbling noise after ignition takes longer than normal. The following gas buildup may fracture your furnace’s heat exchanger, where natural gas turns into warmth. Any breaks in it can leak carbon monoxide, which is ordinarily vented outdoors. This dangerous gas can be deadly in large concentrations.

If you’re noticing banging or knocking sounds coming from your furnace, Giordanos Heating and Air Conditioning recommends turning it off and calling us at 203-772-8319. Significant natural gas in your furnace or a broken heat exchanger are serious problems that should get immediate service.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move heated air throughout your home. If the ductwork wasn’t put in right or is getting old, it can make a lot of noise when your furnace is heating. This can be the issue 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 notice your furnace making a buzzing noise, don’t delay calling us. A buzzing sound typically means there’s an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to run on the proper 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 hot or chilly air around your rooms, and a capacitor, which triggers the motor. If either of these pieces are fading, they will buzz when the furnace switches on.

3. Furnace Rattles

If your furnace is making a rattling noise, it may be due to something minor, like an unsecure screw, or something major, like a broken part. In either case, we advise shutting your furnace off and calling our heating professionals at 203-772-8319 for help.

4. Furnace Squeals

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s trying to get your attention it could use some TLC. If you’ve neglected furnace maintenance recently, belts could be worn down or a bearing could need to be lubed. We are aware that maintenance sometimes slips your mind, but our pros can get your furnace operating quietly again fast.

5. Furnace Makes a Whistling Sound Like Air Escaping

When you’re noticing your furnace making a whistling noise, it’s typically the result of an air leak in your ductwork. You may also be aware of whistling while the furnace is running if a floor vent isn’t secure. If you’ve checked your vents but are still hearing whistling, Giordanos Heating and Air Conditioning can provide support. It’s essential to get loose ductwork taken care of without delay, as it can result in comfort troubles in your home and inflate your energy costs.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not an encouraging sign if you notice your furnace making a grinding noise. This metal-on-metal noise typically means there’s an issue with your furnace’s blower. Shut down your furnace off now and reach us at 203-772-8319 for assistance.

When you’re noticing a weird noise from your furnace, Giordanos Heating and Air Conditioning is here to support you. Contact us at 203-772-8319 to request your furnace repair appointment now.