Washer-dryer will not drain; water remains in drum and E03 is displayed or flashing LEDs indicate drain fault.

Safety first: Unplug the appliance. Water may spill when opening the filter; keep towels and a shallow tray ready.

Step-by-step checks:

• Access the pump filter: Open the lower front service flap. Place a tray under the filter cap. Slowly unscrew the filter to let water drain out in a controlled way.
• Clean the filter: Remove coins, buttons, lint, and other debris from the filter and cavity. Check that the pump impeller turns freely by hand. If jammed or loose on the shaft, the pump may need replacement.
• Inspect the drain hose: Check the external drain hose for kinks or crushing. Detach it from the standpipe or sink trap and flush it with water to clear blockages.
• Check internal hoses: If accessible, inspect the sump hose from the tub to the pump for socks or small garments. Remove the hose clamps and clear any obstruction.
• Test the pump electrically: With the machine unplugged and back panel removed, disconnect the pump connectors and measure coil resistance. An open circuit or very high resistance indicates a faulty pump.
• Reassemble and test: Refit all hoses and clamps securely to prevent leaks. Plug in and run a drain or spin-only program to confirm proper drainage.

When to call a technician: If the pump runs but water still does not drain and all hoses are clear, there may be a blockage in the internal tub outlet or a control board issue requiring professional service.