Front-load Little Swan washer shows E21 and will not drain or spin.

Safety first: Unplug the washer. Prepare for water spillage when opening the filter.

• Clean pump filter thoroughly: Open the lower front access door, place a shallow pan, and slowly remove the filter cap. Clean all lint, hair, and debris. Reach into the pump cavity and feel for obstructions around the impeller.
• Check impeller movement: Gently rotate the impeller. It should move with slight resistance but not be jammed. Remove any trapped objects.
• Flush drain hose: Disconnect the drain hose from the household standpipe and run water through it with a garden hose to confirm it is clear.
• Test pump performance: After reassembly, run a drain/spin cycle with an empty drum. If the pump is noisy, weak, or E21 returns, replace the drain pump assembly.