Washer-dryer combo shows E17; water level rises too high or overflows into the drum.

Safety first: Turn off water supply and unplug the unit immediately if overfilling occurs.

• Shut off water: Close both hot and cold supply valves to stop filling.
• Inspect inlet valve: If water continues to flow into the drum with power off, the inlet valve is mechanically stuck open and must be replaced.
• Check pressure hose and sensor: Remove the top panel and inspect the pressure hose and sensor as described for E7. Clear any blockages and ensure tight connections.
• Test fill: Restore water and power, then run a small cycle while monitoring the fill level. If overfilling recurs, replace the water level sensor and/or inlet valve assembly.
• Control board check: If valves and sensor are new and correctly installed, the main control board may be failing to shut off the valve and should be evaluated by a technician.