Dishwasher shows E20, may not circulate water properly.

Safety first: Disconnect power and water. The pump area may contain sharp debris.

• 1. Listen during wash: If the dishwasher fills but you do not hear the usual strong spray noise, the circulation pump may not be running.
• 2. Check for blockages from inside: Remove filters and inspect the sump opening. Use a torch to look for broken glass, bones, or other objects that could jam the impeller.
• 3. Access pump (advanced): Lay the dishwasher on its back (with towels) and remove the base cover. Locate the circulation pump attached to the sump. Check for signs of leakage or burning.
• 4. Manually turn impeller: With power off, try to rotate the impeller with a finger or screwdriver. If seized, the pump likely needs replacement.

When to call a technician: Circulation pump replacement involves dismantling the hydraulic system and is best done by a professional.