Hopefully you will get your AC up and running.
If you do, while you're up on the roof, clean the coil (radiator looking part) with a can of spray coil cleaner.
It may be our imagination but our AC sounded quieter after we cleaned ours.
Stuart and Susan (Grizabella & Macavity, our imaginary cats)
'12 Entegra Aspire 42DEQ
'94 Jeep Wrangler Toad & '12 Honda Goldwing CSC Trike