Banging, Screeching and Rattling: What 6 Typical Furnace Noises Indicate

October 13, 2020

When your furnace is working properly, it should give warmth without generating too much disruption. While it’s normal to catch your furnace making noise as it turns on, other noises are indicating your furnace needs immediate professional help.

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 professionals are here to fix the problem with the best furnace repair in Derby.

1. Furnace Making a Banging Noise

You might have an urgent 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 increasing in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy over the years, so that’s why it’s important to schedule annual 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 component gets dirty, you may hear your furnace making a loud rumbling noise when ignition is delayed. The ensuing gas buildup might break your furnace’s heat exchanger, where natural gas turns into warmth. Any fractures in it can emit carbon monoxide, which is normally emitted outdoors. This toxic gas can be lethal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Giordanos Heating and Air Conditioning advises turning it off and calling us at 203-772-8319. Significant natural gas in your furnace or a fractured heat exchanger are critical troubles that should get immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to move heated air across your residence. If the ductwork wasn’t designed properly or is aging, it can be noisy when your furnace runs. This might be the problem 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 figure out the problem.

2. Furnace Making a Buzzing Noise

If you hear your furnace making a buzzing noise, don’t delay calling us. A buzzing sound usually is telling you there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace uses 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 warm or chilly air across your home, and a capacitor, which triggers the motor. If either of these components are failing, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

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

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s making an effort to alert you it could use some TLC. If you’ve neglected furnace maintenance the last couple of years, belts could be worn down or a bearing may need to be lubricated. We are aware that maintenance often slips your mind, but our techs can get your furnace running quietly again rapidly.

5. Furnace Making a Whistling Noise

When you’re noticing your furnace making a whistling noise, it’s typically because of an air leak in your ductwork. You might also be aware of whistling while the furnace is operating if a floor vent is loose. If you’ve looked at your vents but are still sensing noise, Giordanos Heating and Air Conditioning can provide support. It’s essential to get loose ductwork taken care of without delay, as it can create comfort issues in your residence and inflate your gas expenses.

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 sound often means there’s an issue with your furnace’s blower. Switch off your furnace off promptly and contact our pros at 203-772-8319 for assistance.

When you’re noticing a weird 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.