E18 displayed; unit may start but then stops when the accessory hose is connected or removed.

Safety first: Unplug the unit before inspecting the hose port.

• Check hose connection: Ensure the AEG accessory hose is fully inserted and locked into the port. Partial insertion can confuse the sensor.
• Inspect port for debris: Look inside the hose port for lint or debris that may block the mechanical actuator or sensor.
• Test hose presence switch: Locate the microswitch or magnetic sensor behind the hose port. Manually actuate it and listen for a click. Test with a multimeter for continuity changes.
• Inspect hose connector: Ensure the hose end is not cracked or missing the tab or magnet that triggers the sensor. Replace the hose if damaged.

Correct hose detection is important because the unit may change suction and spray routing when the hose is attached.