Drier

Melissa C for Model Number PWRO4FANBS

Answer Hello Melissa, Based on the information, it sounds like you have a sealed system restiction. This would require evacuation of refrigerant in the system and replacing the filter drier and possilby more. 

Gary for Model Number GE tbx22ficbrbb

Answer Hello Gary. No, the compressor comes with the oil installed. 

Anthony for Model Number TBXK18KJB

Answer Hi Anthony. If your filter drier is "restricted", then it is considered a sealed system repair. This part # is WR86X96. You really need to contact a local authorized repair technician. In the yellow pages you can request the nearest authorized repair dealer to send one out. This takes trained factory specilist to diagnose, enter and back out of the system properly. Hope this helps. Thank you. 

Bob R. for Model Number gss22s

Answer Hello Bob. The drier functions as a filter for the refrigerant/oil, removing moisture and other contaminants in it. Thanks!