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

October 13, 2020

When your furnace is operating like it should, it should deliver warm air without generating too much sound. While it’s expected to hear your furnace making noise as it turns on, other disruptions are indicating your furnace should get immediate professional help.

Here are some of the most frequent furnace noises and what they can be indicating. If your furnace is making a strange noise, our friendly heating pros are here to help with the best furnace repair in Norton, VA.

1. Furnace Making a Banging Noise

You could 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 few problems. These involve gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system becomes dirty over time, so that’s why it’s essential to schedule yearly furnace maintenance with HCE Systems Inc. One of the tasks our techs perform during this service is clean your furnace’s burners. When this component gets grubby, you could hear your furnace making a loud rumbling noise when ignition takes more time. The subsequent gas buildup may break your furnace’s heat exchanger, where natural gas transforms into warm air. Any cracks in it can discharge carbon monoxide, which is ordinarily emitted outside. This toxic gas can be lethal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, HCE Systems Inc advises turning it off and reaching us at 276-302-0076. Excessive natural gas in your furnace or a ruptured heat exchanger are serious problems that require prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to provide heated air across your house. If the ductwork wasn’t installed right or is aging, it can be noisy when your furnace runs. This might be the case if your furnace makes a banging noise when it shuts off. Get in touch with HCE Systems Inc at 276-302-0076 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

If you hear your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound usually is telling you there’s an electrical problem, 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 is loose, you could hear a low humming noise in the furnace when off. Your furnace also works with a blower motor, which distributes heated or cooled air around 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 might be the result of something minor, like an unsecure screw, or something critical, like a broken component. In either case, we advise shutting your furnace off and calling our heating professionals at 276-302-0076 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s running, it’s attempting to get your attention it could use some TLC. If you’ve neglected furnace maintenance the last couple of years, belts could be worn out or a bearing might need to be greased. We realize that maintenance sometimes slips your mind, but our technicians can get your furnace heating quietly again fast.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s typically due to an air leak in your ductwork. You might also hear whistling while the furnace is running if a floor vent isn’t secure. If you’ve examined your vents but are still noticing noise, HCE Systems Inc can assist you. It’s important to get loose ductwork fixed fast, since it can create comfort problems in your residence and drive up your heating bills.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you hear your furnace making a grinding noise. This metal-on-metal sound frequently means there’s a problem with your furnace’s blower. Turn off your furnace off immediately and contact our pros at 276-302-0076 for help.

When you’re noticing an atypical noise from your furnace, HCE Systems Inc is available to support you. Contact us at 276-302-0076 to request your furnace repair appointment today.