Our dishwashers are fitted with a self-diagnosis system, which in the rare case of a fault will help to report what the problem is. If the E19 or F19 error code appear on the appliance display it means that there is a problem with the dispenser or an internal valve. We recommend that you do not try to resolve the issue on your own at home due to health and safety reasons. Please close the water tap and switch off the appliance. Book an engineer visit to have a professional rectify the problem.