David G Hellertown , PA October 25, 2015 Appliance: Kenmore Undercounter Dishwasher 66516579201 Kenmore Dishwasher 66516579201: The recirculation pump impeller shaft teeth failed causing the screen not to rotate unclean dishes. How to replace Dishwasher Circulation Pump Motor. The impeller design has been revised over the years so a new recirculation pump was purchased. The pump was ordered mid day (EST) was on delivered the next day. The repair was completed before the dinner dishes were ready to be cleaned. Having used AppliancePartsPro (APP) several times I will attest to APP's top notch customer service. Using the Chat Room answered the revised impeller situation and proved a very friendly, professional and successful repair. Thank you APP. This is "Old School" customer service at it's finest!! PS The online video was most helpful. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes