Paul H Sidney , IA January 02, 2023 Appliance: Maytag Dishwasher MDB8959SFZ4 Maytag Dishwasher Mdb8959sfz4: The circulation pump locked up. How to replace Dishwasher Circulation Pump And Motor Assembly. Uninstalled dishwasher. I removed the defective one and installed the new Pump-Motor. Reinstalled dishwasher. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours