Banging, Screeching and Rattling: What 6 Common Furnace Noises Mean

October 13, 2020

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

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

1. Furnace Making a Banging Noise

You could have a serious problem on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it can signal there could be a few problems. These range from gas increasing in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns grimy as time passes, so that’s why it’s important to set annual furnace maintenance with Garoken Energy Co. Inc.. One of the things our techs perform during this service is clean your furnace’s burners. When this part gets grimy, you may hear your furnace making a loud rumbling noise if ignition takes more time. The ensuing gas buildup might fracture your furnace’s heat exchanger, where natural gas turns into warmth. Any fractures in it can leak carbon monoxide, which is ordinarily released away from your home. This toxic gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Garoken Energy Co. Inc. advises turning it off and reaching us at 503-374-1934. Excessive natural gas in your furnace or a fractured heat exchanger are dangerous problems that should get prompt service.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to deliver heated air throughout your residence. If the ductwork wasn’t designed properly or is getting old, it can make a lot of noise when your furnace is on. This can be the case if your furnace makes a banging noise when it shuts off. Get in touch with Garoken Energy Co. Inc. at 503-374-1934 and we’ll pinpoint 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 means there’s an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace relies on an internal transformer to run on the right voltage. If wires or the box is loose, you may notice 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 space, and a capacitor, which turns on 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 related to something minor, like an unfastened screw, or something major, like a broken part. In either case, we urge you to shut your furnace off and calling our heating pros at 503-374-1934 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s trying to get your attention it needs some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be dilapidated or a bearing could need to be lubed. We are aware that maintenance often slips your mind, but our pros can get your furnace running quietly again fast.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s likely because of an air leak in your ductwork. You may also hear whistling while the furnace is on if a floor vent is loose. If you’ve looked at your vents but are still noticing sound, Garoken Energy Co. Inc. can provide support. It’s critical to get loose ductwork repaired without delay, because it can make comfort problems in your house and drive up your gas costs.

6. Furnace Making a Grinding Noise

It’s not a good sign if you notice your furnace making a grinding noise. This metal-on-metal noise usually means there’s an issue with your furnace’s blower. Turn off your furnace off now and call us at 503-374-1934 for help.

When you’re hearing an atypical noise from your furnace, Garoken Energy Co. Inc. is here to provide assistance. Contact us at 503-374-1934 to schedule your furnace repair appointment today.