Alfred L Maryland Heights , MO November 23, 2014 Appliance: Samsung Refrigerator RS2555SW/XAA Samsung Refrigerator Rs2555sw/Xaa / : No cooling with a humming noise from the compressor in samsung rs2555sw refrigerator. How to replace Capacitor. Removed the lower back cover. I had to pry the cover of the compressor. Replaced the start relay and the refrigerator works again. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes