Why won’t my Maytag dishwasher start? A power issue may be responsible, preventing the dishwasher from turning on. Troubleshoot the most likely reasons your Maytag dishwasher won’t start and cut down your kitchen time with the right solutions: 1. No power to the dishwasher. 2. Door is not fully closed and latched. 3. Need to adjust dishwasher settings like child lock, delay start, etc. 4. Problem with dishwasher water supply. 5. One or more defective dishwasher parts.