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

This rinse aid knob is the cap for the dishwasher's rinse aid dispenser. It seals the reservoir to prevent leaks and evaporation and provides a secure grip for refilling, helping the dispenser hold rinse aid as designed.

• Covers and seals the rinse aid reservoir opening to contain rinse aid
• Helps prevent leaks or evaporation from the dispenser
• Provides an easy-to-grip cap for removing/reinstalling during refills
• Common symptoms: missing or cracked cap, rinse aid not staying in the reservoir, leaks inside the door, increased spotting from lack of rinse aid

• Disconnect power to the dishwasher before servicing.
• Replace the cap by hand and ensure it seats fully; do not overtighten.
• After installation, run a short cycle to verify proper sealing and no leaks.