AC Making a Strange Noise in Columbia, SC

The specific sound usually points to the specific part - which is why it's worth describing exactly what you're hearing when you call.

What usually causes this

Squealing - usually a belt or a failing blower motor bearing
Grinding or metal-on-metal - often a motor bearing that's gone, in either the indoor or outdoor unit
Banging or clanking - can mean a loose or broken part inside the compressor, which is a serious fault
Clicking that repeats - often the contactor cycling, sometimes normal, sometimes a sign it's failing

What to do before someone arrives

If it's a grinding or banging noise, shut the system off rather than let it keep running
Try to note whether the sound is coming from the outdoor unit or from inside the house - it changes the diagnosis

Questions people ask

Is a noisy AC an emergency?

Grinding or banging is worth stopping the system for and calling promptly - continuing to run it risks turning a repair into a replacement. A mild rattle or click is usually fine to describe when you call rather than shut down over.

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We pass them straight to a licensed local HVAC contractor who handles ac repair. There is no cost to you.

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What do you need?

How urgent is it?

What is the system doing?Symptoms, when it started, and the system type if you know it. The more detail, the shorter the visit.

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Also see: AC Repair in Columbia, SC

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