Why does my arcadia 2007 whin after ac compressor gets replaced

Take it to another place that uses better parts: Most after market a/c companies are owned by the same company. They have different names, Murray, Four Seasons, etc. Replaced it three times, it's time to find some other place, try the locator on this web site, might help you with that search.

I say it is something else! Yes i saw when you turn A/C off noise stops but it also changes the load on the belt drive system. Tensioner, idlers even the alternator load changes! Unless the compressor oil is low, not enough being put in at install. Something else to consider.