Zanussi dryer displays E21 and may stop with water remaining in the sump or tank not filling properly.

Safety first: Unplug the dryer before accessing the pump or removing panels. Wear gloves to avoid cuts on sharp metal edges.

• 1. Access the pump: Remove the lower front kick panel or rear panel (model dependent). Locate the small condensate pump near the sump at the bottom of the dryer.
• 2. Inspect for obstructions: Look into the pump inlet and sump area. Remove any lint clumps, fabric threads, or foreign objects that may be blocking the impeller.
• 3. Free the impeller: Gently rotate the pump impeller with a non-metallic tool (e.g., plastic stick) to ensure it spins freely. Do not force it if it is seized.
• 4. Check hoses: Detach the small hoses connected to the pump and flush them with warm water to remove blockages. Refit them securely to avoid leaks.
• 5. Electrical check (advanced): If you are competent with electrics, test the pump coil for continuity with a multimeter. No continuity indicates a failed pump that must be replaced.
• 6. Reassemble and test: Refit panels, plug in the dryer, and run a short cycle. If E21 persists, the pump or control board drive circuit may be defective.
• 7. Professional repair: If the pump needs replacement or wiring is damaged, contact a Zanussi-authorized technician.