Is the Sanitize light flashing?
The Sani LED will flash if the dishwasher detects the temperature requirements for sanitization were not met. If this occurs it is a clear indication the dishes were not sanitized. Check the water temperature by running the hot water for about 30 seconds. The water temperature should be at the minimum temperature of 120°F (49°C) stated in the use and care guide.
Was the door opened or power interrupted during the cycle?
If the door was opened during the cycle, the correct temp for the Sanitize Cycle may have not been met due to heat escape.
Cycle power to the control to reset the dishwasher:
Much like a computer, resetting the dishwasher control can sometimes solve the issues you are experiencing. To reset the dishwasher control panel, it needs to be disconnected from the power source for one minute. If your dishwasher is plugged into an outlet, simply unplug the unit for one minute and then plug the unit back in. If the dishwasher is hard wired to the power supply, turn the breaker off at the home electrical panel that powers the dishwasher for one minute and then turn the breaker back on.