Keith D Chandler , TX April 23, 2017 Appliance: Samsung Dishwasher DW80J3020UB/AA Samsung Dishwasher Dw80j3020ub/Aa / 0000: Samsung dishwasher was contiously giving drain and overfill errors (blinking auto and heavy lights). How to replace Dishwasher Drain Check Valve. It was a super easy fix to repair. By replacing the little rubber check valve my dishwasher is working like a champ. 7 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes