Compressor is dead. Cleaning not done Very well will kill the new unit fast. Many DIY leave dirt and flush in the system after "done" and kill new compressor often in days to a season.
Also Flushing removes old oil too and old rubber hoses can leak because old oil plugs pours in them. That often mean rebuilding hose sets w/ barrier hose made for Mobil AC require to meet EPA etc rules.
RA often looks cheaper then checkout and shipping is often more then everyone else. Worse if you want car fix quick.
AZ etc stores can get parts same or next day w/o shipping. Order online spend X and shipping is free and discounts too that can beat RA.
AZ and others take returns and cores at local stores even for online orders.
RA is a handly reference but I buy local interdependent stores, AZ or AdvanceA because of above.
AZ AA just needs a Phone # to honor Warranty parts too. No BS of receipt printed on thermal or ink that fades in a few weeks like Pepboys that doesn't even honor warranty from another pepboy store.
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Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave