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

When your furnace is running correctly, it should deliver heat without generating too much disruption. While it’s expected to catch your furnace making noise as it turns on, other sounds are signaling your furnace requires immediate professional support.

Here are some of the most common furnace noises and what they might mean. If your furnace is making a strange noise, our friendly heating pros are here to help with the best furnace repair in Bossier City.

1. Furnace Making a Banging Noise

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

Banging Sounds Coming from Your Furnace

Your heating system turns filthy as time passes, so that’s why it’s important to set seasonal furnace maintenance with Brooks Heating and Air Conditioning. One of the things our techs perform during this appointment is clean your furnace’s burners. When this part gets grimy, you may hear your furnace making a loud rumbling noise after ignition takes longer than normal. The subsequent gas buildup might fracture your furnace’s heat exchanger, where natural gas changes into warm air. Any cracks in it can leak carbon monoxide, which is regularly emitted outdoors. This dangerous gas can be lethal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Brooks Heating and Air Conditioning advises turning it off and calling us at 800-COOLING. Significant natural gas in your furnace or a ruptured heat exchanger are critical troubles that require prompt repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to deliver warm air around your home. If the ductwork wasn’t installed correctly or is getting old, it can be noisy when your furnace is on. This can be the problem if your furnace makes a banging noise when it shuts off. Contact Brooks Heating and Air Conditioning at 800-COOLING and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

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

Your furnace uses an internal transformer to operate on the right voltage. If wires or the box needs to be tightened, you may hear a low humming noise in the furnace when off. Your furnace also uses a blower motor, which moves hot or chilly air throughout your house, and a capacitor, which turns on 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 the result of something small, like a loose screw, or something critical, like a broken component. In either case, we recommend shutting off your furnace and getting in touch with our heating specialists at 800-COOLING for assistance.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s heating, it’s trying to tell you it needs some TLC. If you’ve skipped furnace maintenance the last couple of years, belts could be worn down or a bearing may need to be greased. We are aware that maintenance frequently slips your mind, but our techs can get your furnace operating quietly again fast.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s frequently due to an air leak in your ductwork. You could also hear whistling while the furnace is working if a floor vent isn’t secure. If you’ve looked at your vents but are still noticing sound, Brooks Heating and Air Conditioning can assist you. It’s important to get loose ductwork fixed fast, since it can result in comfort issues in your house and drive up your utility bills.

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 sound typically means there’s an issue with your furnace’s blower. Shut down your furnace off right away and contact us at 800-COOLING for assistance.

When you’re hearing an uncommon noise from your furnace, Brooks Heating and Air Conditioning is ready to support you. Contact us at 800-COOLING to schedule your furnace repair appointment now.

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