John L Rochester , NY December 13, 2019 Appliance: Maytag Undercounter Dishwasher MDB8949SAB0 Maytag Dishwasher Mdb8949sab0 / : Circulation motor wouldn't run, it would try to start. It would hum for a few seconds then quit. How to replace Circulation Motor. I bought a new circulation motor from AppliancePartsPros.com and reviewed their video on how to install it. After removing the old motor, however, I noticed that the chopper assembly that links to the motor shaft was jammed with a chip from a dinner plate. With the obstruction removed, the old motor worked fine. So I returned the new motor for a refund. Thanks to AppliancePartsPros.com for the great information, diagrams, and instructional videos that enabled me to successfully diagnose and fix the problem. I will definitely be returning for all my future appliance repair needs! Do-It-Yourself Rating: Repair Time Estimate: 2+ hours