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

When your furnace is working properly, it should give heat without creating too much disruption. While it’s normal to hear your furnace making noise as it starts up, other sounds are showing your furnace should get immediate professional help.

Here are some of the most frequent furnace noises and what they might be signaling. If your furnace is making a weird noise, our friendly heating professionals are here to fix the problem with the best furnace repair in Perry.

1. Furnace Making a Banging Noise

You could have a critical issue on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it can indicate there could be a couple of problems. These involve gas building up 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 schedule routine furnace maintenance with Gillman Heating and Air. One of the jobs our techs perform during this work is clean your furnace’s burners. When this component gets grimy, you could hear your furnace making a loud rumbling noise after ignition takes more time. The ensuing gas buildup might fracture your furnace’s heat exchanger, where natural gas transforms into heat. Any breaks in it can emit carbon monoxide, which is ordinarily vented outdoors. This toxic gas can be lethal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Gillman Heating and Air recommends turning it off and contacting us at 478-202-3076. Excessive natural gas in your furnace or a ruptured heat exchanger are hazardous issues that should get prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace relies on ductwork to move hot air throughout your home. If the ductwork wasn’t designed properly or is getting dated, it can be loud when your furnace is heating. This could be the case if your furnace makes a banging noise when it shuts off. Contact Gillman Heating and Air at 478-202-3076 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

If you hear your furnace making a buzzing noise, don’t wait to call us. A buzzing sound typically means there’s an electrical problem, like with its transformer, blower motor or capacitor.

Your furnace depends on an internal transformer to operate on the right voltage. If wires or the box isn’t tight enough, you could detect a low humming noise in the furnace when off. Your furnace also works with a blower motor, which sends heated or cooled air throughout your space, and a capacitor, which starts the motor. If either of these components are failing, they will buzz when the furnace switches on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it may be related to something minor, like an unsecure screw, or something critical, like a broken component. In either case, we recommend shutting off your furnace and calling our heating specialists at 478-202-3076 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 get your attention it could use some TLC. If you’ve skipped furnace maintenance recently, belts could be worn down or a bearing could need to be greased. We know that maintenance sometimes slips your mind, but our techs can get your furnace heating quietly again rapidly.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s typically because of an air leak in your ductwork. You may also hear whistling while the furnace is on if a floor vent isn’t tight. If you’ve checked your vents but are still hearing whistling, Gillman Heating and Air can assist you. It’s critical to get loose ductwork taken care of without delay, because it can create comfort issues in your home and inflate your heating bills.

6. Furnace Making a Grinding Noise

It’s not a positive sign if you notice your furnace making a grinding noise. This metal-on-metal racket often means there’s trouble with your furnace’s blower. Switch off your furnace off now and call our professionals at 478-202-3076 for assistance.

When you’re noticing an uncommon noise from your furnace, Gillman Heating and Air is ready to provide assistance. Contact us at 478-202-3076 to book your furnace repair appointment now.

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