Daniel H Germantown , MD May 16, 2017 Appliance: Samsung Dishwasher DW80F600UTS/AA-0000 Samsung Dishwasher Dw80f600uts/Aa-0000 / : Smart auto and heavy light flashing. How to replace Dishwasher Drain Check Valve. Purchased used dishwasher and smart auto aheavy light flashing. Replaced parts and it works pretty good now. This is 2nd time purchased parts and all the instructions were available on the website. Thank you AppliancePartsPros.com! Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes