Ryan F Thibodaux , LA February 06, 2017 Appliance: Samsung Refrigerator RF268ABRS/XAA-0000 Samsung Refrigerator Rf268abrs/Xaa-0000 / : Step motor stopped working, Samsung bottom freezer was not cooling but the fridge was. How to replace Refrigerator Motor Step Valve Assembly. Had to replace the step motor and recharge cooling system. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours