Hello tigergurle. You will need to disconnect the power to the unit. Then remove all the screws on the inner door panel and remove the inner door panel. Once removed, you will need to remove the cover on the control board and remove the ribbon cable from the control board. On the ribbon cable is an arrow by one of the contacts. The arrow is number 1. You will need to test across pins 10 and 6. When you push the start/cancel button, the contact should close for continuity. If it does not, you will need to replace the control panel. If the control panel needs replaced, you will remove the screws holding the control board in place. Then remove the screws holding the control panel in place. Reinstall in reverse order. Hope this helps.
Part number: AP4364316
Control panel replacement parts for MAYTAG MDBH945AWS DISHWASHER- UNDERCOUNTER | AppliancePartsPros.com