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

When your furnace is working properly, it should provide heat without making too much noise. While it’s expected to notice your furnace making noise as it turns on, other noises are signaling your furnace needs immediate professional support.

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

1. Furnace Making a Banging Noise

You could have a serious situation on your hands if you’re detecting your furnace making a banging noise. If your furnace is making a knocking noise, it might mean there could be several problems. These involve gas accumulating in your furnace or a ductwork problem.

Banging Sounds Coming from Your Furnace

Your heating system gets grimy over the years, so that’s why it’s essential to book seasonal furnace maintenance with McFadden Heating & Cooling. One of the jobs our technicians do during this appointment is clean your furnace’s burners. When this part gets grimy, you could hear your furnace making a loud rumbling noise if ignition takes longer than normal. The subsequent gas buildup might crack your furnace’s heat exchanger, where natural gas transforms into warmth. Any breaks in it can discharge carbon monoxide, which is ordinarily released away from your home. This toxic gas can be deadly in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, McFadden Heating & Cooling advises turning it off and contacting us at 1-866-781-0111. Too much natural gas in your furnace or a ruptured heat exchanger are dangerous problems that necessitate immediate repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to provide hot air throughout your house. If the ductwork wasn’t designed correctly or is aging, it can be loud when your furnace is on. This could be the problem if your furnace makes a banging noise when it shuts off. Call McFadden Heating & Cooling at 1-866-781-0111 and we’ll pinpoint 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 frequently is telling you there’s an electrical situation, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to work on the proper voltage. If wires or the box is loose, you might detect a low humming noise in the furnace when off. Your furnace also works with a blower motor, which moves heated or cold air across your house, and a capacitor, which starts the motor. If either of these parts are fading, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it might be due to something small, like an unsecure screw, or something major, like a broken piece. In either case, we urge you to shut your furnace off and calling our heating pros at 1-866-781-0111 for support.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s going, it’s trying to tell you it requires some TLC. If you’ve neglected furnace maintenance recently, belts could be worn down or a bearing could need to be lubricated. We are aware that maintenance frequently slips your mind, but our technicians can get your furnace running quietly again fast.

5. Furnace Making a Whistling Noise

When you’re hearing your furnace making a whistling noise, it’s typically due to an air leak in your ductwork. You may also notice whistling while the furnace is operating if a floor vent isn’t secure. If you’ve examined your vents but are still hearing noise, McFadden Heating & Cooling can help. It’s essential to get loose ductwork taken care of fast, as it can result in comfort troubles in your house and drive up your utility bills.

6. Furnace Making a Grinding Noise

It’s not a good sign if you detect your furnace making a grinding noise. This metal-on-metal racket often means there’s a problem with your furnace’s blower. Shut down your furnace off instantly and contact us at 1-866-781-0111 for assistance.

When you’re hearing an uncommon noise from your furnace, McFadden Heating & Cooling is ready to help. Contact us at 1-866-781-0111 to schedule your furnace repair appointment now.

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