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

When your furnace is operating correctly, it should deliver warmth without making too much disruption. While it’s normal to hear your furnace making noise as it begins running, other disruptions are indicating your furnace needs immediate professional help.

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

1. Furnace Making a Banging Noise

You may have an urgent problem on your hands if you’re hearing your furnace making a banging noise. If your furnace is making a knocking noise, it might indicate there could be a few problems. These include gas increasing in your furnace or a ductwork situation.

Banging Sounds Coming from Your Furnace

Your heating system becomes dirty over the years, so that’s why it’s important to book yearly furnace maintenance with Bishop Heating & Air Conditioning. One of the jobs our technicians complete during this appointment is clean your furnace’s burners. When this part gets dirty, you may hear your furnace making a loud rumbling noise after ignition takes longer than normal. The resulting gas buildup can fracture your furnace’s heat exchanger, where natural gas transforms into warm air. Any cracks in it can leak carbon monoxide, which is regularly vented outside. This hazardous gas can be fatal in large concentrations.

If you’re hearing banging or knocking sounds coming from your furnace, Bishop Heating & Air Conditioning recommends turning it off and reaching us at 760-784-9034. Too much natural gas in your furnace or a ruptured heat exchanger are critical issues that necessitate prompt repairs.

Banging Sounds Coming from Your Ductwork

Your furnace works with ductwork to move warm air across your house. If the ductwork wasn’t installed correctly or is getting dated, it can make a lot of noise when your furnace runs. This might be the issue if your furnace makes a banging noise when it shuts off. Contact Bishop Heating & Air Conditioning at 760-784-9034 and we’ll determine the problem.

2. Furnace Making a Buzzing Noise

If you observe your furnace making a buzzing noise, don’t wait to call us. A buzzing sound usually indicates an electrical issue, like with its transformer, blower motor or capacitor.

Your furnace uses an internal transformer to work 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 distributes heated or cooled air throughout your space, and a capacitor, which triggers the motor. If either of these components are fading, they will buzz when the furnace starts.

3. Furnace Making a Rattling Noise

If your furnace is making a rattling noise, it can be due to something little, like an unfastened screw, or something serious, like a broken component. In either case, we urge you to shut your furnace off and getting in touch with our heating professionals at 760-784-9034 for help.

4. Furnace Making a Squealing Noise

If your furnace makes a high-pitched noise, like squealing, when it’s on, it’s trying 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 greased. We realize that maintenance frequently slips your mind, but our techs can get your furnace operating quietly again rapidly.

5. Furnace Making a Whistling Noise

When you’re detecting your furnace making a whistling noise, it’s typically the result of an air leak in your ductwork. You might also be aware of whistling while the furnace is running if a floor vent isn’t tight. If you’ve examined your vents but are still noticing whistling, Bishop Heating & Air Conditioning can provide support. It’s important to get loose ductwork repaired fast, as it can result in comfort troubles in your house and drive up your energy expenses.

6. Furnace Making a Grinding Noise

It’s not an encouraging sign if you notice 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 now and reach us at 760-784-9034 for assistance.

When you’re noticing a strange noise from your furnace, Bishop Heating & Air Conditioning is here to provide assistance. Contact us at 760-784-9034 to book your furnace repair appointment right away.

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