The Call
A customer in Fort Lauderdale called us because their KitchenAid dishwasher was completing full cycles but leaving dishes just as dirty as they went in. The detail that caught our attention immediately: the detergent pod was either lying undissolved on the bottom of the tub or still sitting in the dispenser after the cycle ended. The dishwasher was running — but clearly nothing was happening inside.
This combination of symptoms — dishes not cleaned, detergent untouched — is a near-certain sign of a circulation pump failure before we even open the door.
Diagnosis
Confirmed symptoms visually
Opened the dishwasher after a completed cycle. Dishes were dirty, food residue still present, and the detergent pod was sitting intact on the tub floor — never dissolved. Water had clearly filled and drained, but no washing had occurred.
Ran the diagnostic cycle
Initiated the built-in diagnostic mode. The fill valve opened and the tub filled with water normally. Then came the key finding: a humming noise from the circulation pump location — the motor was receiving power and trying to run — but no water movement, no spray arm pressure, nothing reaching the dishes. The pump motor was energized but not pumping.
Confirmed circulation pump failure
Pulled the dishwasher out and accessed the pump assembly from below. The circulation pump impeller was seized — the motor was spinning but the impeller was no longer moving water. Consistent with the bearing and impeller wear pattern we see on Whirlpool-platform dishwashers in the 5–7 year range.
The Repair
KitchenAid dishwashers are manufactured by Whirlpool Corporation, and the same circulation pump is used across KitchenAid, Whirlpool, Maytag, and Amana dishwasher lines. Because this is a predictable failure on all Whirlpool-built dishwashers around the 5-year mark, we keep the part stocked in the van. No sourcing delay, no return visit required.
The old pump was removed and replaced with the new assembly. Total time on site: 45 minutes for a single visit including diagnosis, disassembly, installation, and a full test cycle to confirm spray arm pressure was restored and dishes were being properly reached.
Why Whirlpool-Built Dishwashers Have This Problem
KitchenAid is a Whirlpool brand, and the dishwasher platforms are shared across KitchenAid, Whirlpool, Maytag, and Amana. The circulation pump on these models handles thousands of wash cycles over its life, pushing hot water at pressure through the spray arms on every cycle. Around the 5-year mark — sometimes earlier in homes with hard water, which is common throughout South Florida — the pump's bearings and impeller show wear from heat cycling and mineral buildup.
The failure mode is consistent: the motor still receives power and hums, but the impeller no longer pumps water efficiently. Because this pattern repeats across the entire Whirlpool dishwasher platform, it is one of the repairs we are fully prepared for on every service call to a home with a KitchenAid, Whirlpool, or Maytag dishwasher of this age.