E16 displayed; drain valve or drain solenoid malfunction, machine cannot switch between wash and drain correctly.

Safety first: Disconnect power and ensure the tank is drained before removing the drain valve.

• Locate drain valve: Identify the drain valve assembly connected to the sump or tank outlet. Note the position of the actuator or solenoid.
• Check mechanical movement: Manually operate the valve lever or stem (if accessible). It should move smoothly between positions. If stiff or jammed, remove and clean the valve body.
• Inspect for debris: Disassemble the valve and remove any food particles, glass, or scale preventing full closure or opening.
• Test solenoid coil: Measure resistance across the coil terminals. An open circuit indicates a failed solenoid that must be replaced.
• Verify wiring: Check the harness from the control board to the solenoid for continuity and secure connections.
• Reassemble and test: After cleaning or replacing parts, run a cycle and observe valve operation. If E16 persists, the control output may be faulty and require professional service.