A loud squeal or screech the moment you turn on the AC. This usually comes from the drive belt or a struggling compressor under load.
Find a ProviderSwitching on the AC adds load via the compressor; a worn or loose belt slips under that extra load and squeals.
Sometimes, but if the compressor is seizing it can ruin a new belt quickly — a diagnosis confirms the real cause first.
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Your provider comes to your location, diagnoses the issue on the spot, and gets you back on the road.