Banging, Hissing and Rattling: What Six Familiar Furnace Sounds Mean

When your furnace is working properly, it should give warmth without creating too much sound. While it’s common to notice your furnace making noise as it starts up, other sounds are indicating your furnace should get immediate professional help.

Here are some of the most frequent furnace noises and what they can mean. If your furnace is making an odd noise, our friendly heating pros are here to fix the problem with the best furnace repair in Oxford, Mississippi.

1. Furnace Makes a Banging Sound

You may have an urgent problem on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it may signal there could be a few problems. These involve gas building up in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system turns dirty over time, so that’s why it’s critical to schedule routine furnace maintenance with Franklin's Heating & Air Conditioning, Inc. One of the tasks our pros do during this appointment is clean your furnace’s burners. When this piece gets grimy, you could hear your furnace making a loud rumbling noise if ignition is delayed. The subsequent gas buildup might crack your furnace’s heat exchanger, where natural gas turns into warm air. Any fractures in it can discharge carbon monoxide, which is normally emitted away from your home. This dangerous gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Franklin's Heating & Air Conditioning, Inc recommends turning it off and reaching us at 662-281-1231. Too much natural gas in your furnace or a cracked heat exchanger are serious issues that require fast repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to provide heated air throughout your residence. If the ductwork wasn’t put in properly or is getting old, it can be noisy when your furnace is heating. This can be the case if your furnace makes a banging noise when it shuts off. Call Franklin's Heating & Air Conditioning, Inc at 662-281-1231 and we’ll determine the problem.

2. Furnace Making a Buzzing Noise

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

Your furnace depends on an internal transformer to work on the correct voltage. If wires or the box is loose, you could notice a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves hot or cold air throughout your space, and a capacitor, which starts 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 the result of something minor, like a loose screw, or something serious, like a broken part. In either case, we recommend shutting off your furnace and calling our heating pros at 662-281-1231 for help.

4. Furnace Squeals

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

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s frequently because 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 hearing whistling, Franklin's Heating & Air Conditioning, Inc can help. It’s important to get loose ductwork fixed without delay, because it can make comfort problems in your residence and increase your heating bills.

6. Furnace Makes a Loud, Unpleasant Grinding Noise

It’s not a good sign if you detect your furnace making a grinding noise. This metal-on-metal sound usually means there’s trouble with your furnace’s blower. Shut down your furnace off now and contact our pros at 662-281-1231 for support.

When you’re getting a weird noise from your furnace, Franklin's Heating & Air Conditioning, Inc is available to help. Contact us at 662-281-1231 to book your furnace repair appointment right away.