This is a bit of a complicated question. There isn’t a machine on this planet that works silently, since the clicking and whirring of metal parts is pretty much synonymous with anything that actually works. If your car was completely silent when you twisted the key, you’d likely be concerned, right? The same thing goes with your central air conditioner. It’s supposed to make some kind of noise, like the gently woosh of air coming from the vents and the quiet hum of the compressor.
But there are also noises that your central AC in Monroeville, IN should never make. Things like grinding, buzzing, and squealing are all noises that are considered bad and can warrant a repair call. The hard part about this is that only homeowners are going to be the ones who make the call, so they need to be informed on what noises are good and which ones are bad.