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

When your furnace is working correctly, it should provide warmth without generating too much sound. While it’s normal to hear your furnace making noise as it starts up, other disruptions are signaling your furnace should get immediate professional help.

Here are some of the most common furnace noises and what they could be indicating. If your furnace is making an odd noise, our friendly heating specialists are here to help with the best furnace repair in Genoa.

1. Furnace Making a Banging Noise

You might have a serious issue on your hands if you’re noticing your furnace making a banging noise. If your furnace is making a knocking noise, it may signal there could be several problems. These involve gas increasing 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 essential to set routine furnace maintenance with Assured Appliance and Heating & Air. One of the tasks our professionals do during this service is clean your furnace’s burners. When this part gets grubby, you might hear your furnace making a loud rumbling noise after ignition takes more time. The resulting 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 normally released outdoors. This dangerous gas can be fatal in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Assured Appliance and Heating & Air recommends turning it off and contacting us at 847-306-8990. Significant natural gas in your furnace or a broken heat exchanger are critical issues that require prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace uses ductwork to deliver heated air around your residence. If the ductwork wasn’t put in correctly or is getting old, it can make a lot of noise when your furnace is on. This could be the problem if your furnace makes a banging noise when it shuts off. Contact Assured Appliance and Heating & Air at 847-306-8990 and we’ll figure out 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 typically indicates an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to operate 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 uses a blower motor, which sends warm or cold air throughout your house, and a capacitor, which turns on the motor. If either of these pieces are failing, they will buzz when the furnace turns on.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it can be related to something minor, like an unsecure screw, or something serious, like a broken component. In either case, we advise shutting your furnace off and contacting our heating pros at 847-306-8990 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 alert you it needs some TLC. If you’ve forgotten furnace maintenance the last couple of years, belts could be worn down or a bearing could need to be lubricated. We know that maintenance sometimes slips your mind, but our professionals can get your furnace running quietly again quickly.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s typically because of an air leak in your ductwork. You could also hear whistling while the furnace is running if a floor vent is loose. If you’ve checked your vents but are still noticing sound, Assured Appliance and Heating & Air can provide support. It’s critical to get loose ductwork fixed without delay, since it can make comfort troubles in your house and inflate your utility bills.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you detect your furnace making a grinding noise. This metal-on-metal sound often means there’s trouble with your furnace’s blower. Shut down your furnace off immediately and call us at 847-306-8990 for assistance.

When you’re hearing a weird noise from your furnace, Assured Appliance and Heating & Air is available to provide assistance. Contact us at 847-306-8990 to book your furnace repair appointment now.

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