Samsung RF28K9070S Refrigerator came to me with locked rotor (4 flashing lights on inverter board). So here is what I did.
Cut out old locked compressor - No pressure or Freon when I cut it out.
Flushed system then blew out with Nitrogen.
Installed New factory OEM Samsung compressor NC1MV90ALP E01
Installed new Drier Filter with High Side valve
Blew out with nitrogen
Then.pulled a Vacuum - found leak in evaporator in lower right freezer compartment. - fixed leak in evaporator - had to braze hole in copper to aluminum fitting.
Checked leak with 250 psi Nitrogen check then pulled vacuum again. No Leak now!
Dropped in R134A Freon weight of factory spec of 6.88 oz. of Freon.
Refrigerator compressor comes on and stepper valve rotates but no cooling in fridge what did I miss? Why is it not cooling ?