The answer to 'central air making loud noise' is that a loud noise coming from your central air conditioning unit is often a sign of a problem that requires attention. Some common causes include worn bearings in the fan motor, a failing compressor, or debris obstructing the airflow.
If you notice unusual noises like grinding, squealing, or banging, it's best to have a professional HVAC technician inspect the system as soon as possible. Ignoring a loud noise can lead to further damage and more expensive repairs down the line. While some minor issues may be DIY-friendly, it's generally recommended to call in an expert to diagnose and fix the problem to ensure the safety and proper functioning of your central air unit.