Customer Questions and Answers for Rinse Aid Cap (Dispenser) by Whirlpool

This part is the rinse-aid cap/knob that seals the dishwasher's rinse-aid reservoir in the door-mounted dispenser. A secure cap prevents leaks and evaporation so rinse aid dispenses properly, helping reduce spots and improve drying.

• Seals the rinse-aid fill port on the dispenser to prevent leaks and evaporation
• Helps the dispenser meter rinse aid during the final rinse
• Common symptoms of a bad/missing cap: loose or cracked cap, rinse-aid odor or residue inside the door, rinse aid depleting quickly, increased spotting on dishes
• Restores proper sealing and helps maintain consistent drying performance

• Disconnect power at the breaker and turn off water before servicing
• Open the door, remove the old cap by turning counterclockwise
• Clean the sealing surface; install the new cap by hand and tighten until snug—do not overtighten
• Run a quick cycle and check for leaks around the dispenser