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

When your furnace is working properly, it should give warmth without making too much disruption. While it’s expected to catch your furnace making noise as it starts up, other noises are showing your furnace requires immediate professional help.

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

1. Furnace Making a Banging Noise

You could have an urgent situation on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it may indicate there could be a couple of problems. These involve gas accumulating in your furnace or a ductwork issue.

Banging Sounds Coming from Your Furnace

Your heating system turns filthy over the years, so that’s why it’s essential to set annual furnace maintenance with Colvin's Heating and Cooling. One of the tasks our technicians complete during this appointment is clean your furnace’s burners. When this part gets grimy, you could hear your furnace making a loud rumbling noise after ignition takes longer than normal. The subsequent gas buildup can fracture your furnace’s heat exchanger, where natural gas turns into warmth. Any fractures in it can emit carbon monoxide, which is regularly released outside. This hazardous gas can be deadly in large concentrations.

If you’re aware of banging or knocking sounds coming from your furnace, Colvin's Heating and Cooling urges you to turn it off and reaching us at 816-379-3918. Excessive natural gas in your furnace or a broken heat exchanger are critical troubles that require prompt attention.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to deliver warm air throughout your residence. If the ductwork wasn’t put in right or is getting dated, it can make a lot of noise when your furnace runs. This may be the problem if your furnace makes a banging noise when it shuts off. Get in touch with Colvin's Heating and Cooling at 816-379-3918 and we’ll figure out the problem.

2. Furnace Making a Buzzing Noise

If you observe your furnace making a buzzing noise, don’t hesitate to call us. A buzzing sound often means there’s an electrical situation, 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 might notice a low humming noise in the furnace when off. Your furnace also uses a blower motor, which moves heated or cooled air across your rooms, and a capacitor, which turns on the motor. If either of these parts are failing, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it might be related to something small, like an unfastened screw, or something serious, like a broken piece. In either case, we recommend shutting off your furnace and calling our heating professionals at 816-379-3918 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s attempting to tell you it needs some TLC. If you’ve neglected furnace maintenance recently, belts could be worn out or a bearing could need to be lubricated. We know that maintenance often slips your mind, but our pros can get your furnace operating quietly again quickly.

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 may also be aware of whistling while the furnace is operating if a floor vent isn’t secure. If you’ve checked your vents but are still hearing whistling, Colvin's Heating and Cooling can assist you. It’s important to get loose ductwork fixed fast, since it can result in comfort troubles in your home and increase your energy costs.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you hear your furnace making a grinding noise. This metal-on-metal noise frequently means there’s trouble with your furnace’s blower. Shut down your furnace off immediately and reach our pros at 816-379-3918 for help.

When you’re getting a weird noise from your furnace, Colvin's Heating and Cooling is available to provide assistance. Contact us at 816-379-3918 to book your furnace repair appointment today.

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