The clogged drain system might be responsible for that. The dishwasher discharges water too slowly and cannot completely finish the process, so the error is occurred. Another reason is a restricted water supply. In this case the dishwasher is unable to fill the necessary volume of water and for the reason of “error” gets stopped. Because of insufficient door housing, the dishwasher may start working and during the process water sprays can press the door and break contacts of lock switch which results in operational disruption. There also can be various failures in main boards program, all of them are subject to detect within the full diagnosis mode. We know how to perform diagnostic tests of all dishwasher brands and models and will easily repair yours.