Customer Questions and Answers for Impeller Assembly (Wash) by Whirlpool

This dishwasher impeller assembly mounts on the circulation pump and pressurizes wash water for the spray arms. Replacing a worn or damaged impeller restores proper spray pressure, cleaning performance, and quieter operation.

• Spins with the circulation motor to pressurize wash water
• Drives flow to the spray arms for effective wash action
• Typical symptoms: weak or no spray, poor cleaning results, grinding or rattling from pump area
• Often fails from broken vanes or debris; inspect filters/chopper while open

• Disconnect power and water before servicing
• Access is typically from inside the tub: remove the lower spray arm, filter screens, and cover to reach the impeller
• Note the order of parts and transfer any reusable hardware; replace worn O-rings/seals as needed
• Do not overtighten plastic parts; verify the impeller spins freely before reassembly and testing