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My HVAC Unit Sure Makes a Lot of Noise – What Does This Mean?

residential air conditioner unit

Sometimes we get troubleshooting calls from our customers, complaining about a weird or odd noise coming from their HVAC units. While it can be humorous to hear someone make banging or whooshing noises in an attempt to describe the problem, we know it’s also quite stressful. You’re probably wondering if the sounds are normal, or if they’re the harbinger of a giant HVAC repair bill. You’re also thinking about your schedule, and how inconvenient it would be to have a system on the fritz.

Don’t worry! We’re here to help.

Weird Sounds from Your HVAC: When It’s Normal (and When It’s Not)

When heat pumps kick on, you might hear a loud whump followed by an electric buzz or whirring noise. This sound is especially common in the winter months, usually indicating your heat pump is in the defrost mode. The buzzing noise is most likely the solenoid coil: a low voltage device whose "loudness" can vary depending on the type and size of the model.

On the other hand, if what you are hearing sounds like metal clanging on metal, you'll want shut your unit down IMMEDIATELY. This likely means your fan blades are coming into contact with something they shouldn't: loose wires, ice, or even internal tubing. When this happens, you run the risk of damaging not only the fan but refrigerant lines and other key parts.

Sound Like Something Else Entirely?

No problem. Contact our troubleshooting experts, and we will happily listen to your best problem noise impersonation, and let you know if we need to come out for an inspection.

Jerry's Air Conditioning & Heating

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Jerry's HVAC
Jerry's HVAC
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931 South Santiago Drive

Florence, SC 29501