John C Fort Lauderdale , FL April 10, 2015 Appliance: Whirlpool Dishwasher DU840SWKT0 Whirlpool Dishwasher Du840swkt0: Not cleaning properly & detergent door not opening every time. How to replace Latch Kit. I replaced the parts ordered and it is now working fine. The Repair Video was extremely useful. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes