E11 error; rinse aid is not being dispensed and glasses may show spotting or poor drying.

Safety first: Disconnect power before accessing internal components. Use gloves when handling rinse aid.

• Verify rinse aid level: Check the external or built-in rinse aid container and refill if empty.
• Clean suction filter: Remove the suction tube from the container and clean any small filter or check valve at the end. Rinse under warm water to remove residue.
• Inspect tubing: Follow the tubing from the pump to the injection point. Straighten any kinks and replace brittle or cracked tubing.
• Test pump: In service/test mode (if available), trigger a rinse aid dose and listen for the pump. If silent or only humming, the pump may be seized and require replacement.
• Check electrical connections: Ensure the pump connectors are firmly attached to the control board and that there are no burnt contacts.