Mel T West Islip , NY July 19, 2019 Appliance: Whirlpool Undercounter Dishwasher DU1100XTPQA Whirlpool Dishwasher Du1100xtpqa: Whirlpool dishwasher not dispensing rinse aid. How to replace Dispenser Assembly. Ordered new dispenser assembly and replaced old one. Now working great. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes