KitchenAid dishwashers notify users of errors by beeping and displaying red lights next to one or more of the buttons on the display. Often, a sequence of red lights means the dishwasher needs to be serviced. In some cases, the dishwasher displays error codes when there is no error; resetting it or disconnecting and reconnecting the power often solves these phantom errors.
Temperature Sensor Problems
If the dishwasher displays red lights by "Rinse" and "Light/China" or a red light by "Quick Clean", there is a problem with the temperature sensor. The water going into the dishwasher may be too hot or the heating element may be malfunctioning. If the error message does not disappear when you reset the dishwasher, call your service representative to make an appointment for service.
Problems Requiring Immediate Service
If the motor, electronics or flood switch malfunction, your KitchenAid dishwasher requires service. The dishwasher indicates motor problems with a red light by "Light/China" and electronic problems with a red light by both "Rinse" and "Normal". If the dishwasher displays a red light by "Rinse", the unit's flood switch is activated. Disconnect the power supply until a service representative can check your dishwasher.
Sometimes the dishwasher does not fill correctly. It indicates this problem by displaying a red light by "Rinse" and "Heavy". Open the dishwasher and make sure nothing is blocking the spray arm. Remove any water that is sitting in the dishwasher before closing the dishwasher and resetting it.
If all the lights are flashing, your KitchenAid dishwasher might have gotten stuck while trying to report some type of error, according to the Bosch Dishwasher Troubleshooting website. Try pressing "Heated Dry", then "Normal", then "Heated Dry", then "Normal" to reset the dishwasher. The lights should all come on and stay on steadily when you reset it.