Charles R Sanford , FL November 24, 2014 Appliance: Whirlpool Undercounter Dishwasher DU1300XTVS1 Whirlpool Dishwasher Du1300xtvs1: Had to replace the detergent dispenser. How to replace Dishwasher Detergent Dispenser Assembly. I watched the repair video on your site and followed the instructions that were given Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes