Daniel S West Bend , WI August 01, 2015 Appliance: Maytag Dishwasher MDB4000AWX Maytag Dishwasher Mdb4000awx: Timer was getting stuck and not advancing through the cycles. How to replace Sub 12001533. Killed the power,pulled off knob,removed inner plastic door panel with 7 torx head screws, lifted off black plastic timer cover and removed 3 hex screws, unplugged 2 wiring harnesses and a single wire crimp on plug. Installed the new timer, plugged in the harnesses and the single wire, installed cover and installed the inner door. Ran once so far, seems to work fine. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes