What does error code E-21 mean?

Error code E-21 typically indicates a problem related to the drainage system in appliances like washing machines or dishwashers. It often points to a blockage or failure in the water pump, which prevents proper drainage. To resolve this, check for clogs in the drain hose or filter, and ensure the pump is functioning correctly. If the issue persists, consulting the appliance's manual or a professional may be necessary.