Adam M Spokane , WA August 06, 2025 Appliance: Maytag Dishwasher MDB4949SHZ1 Maytag Dishwasher Mdb4949shz1: Buzzing/humming during wash cycle. How to replace Food Chopper Assembly. Didn’t know if I’d be able to identify the problem but when I opened the pump cover it was easy to see that the chopper assembly was completely disintegrated. Replaced it with a new one which resolved the problem. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes