E06 displayed, suction is weak or absent, and the recovery tank may not be filling.

Safety: Unplug the unit before inspecting internal passages.

• Empty and reseat tanks: Remove, empty, and thoroughly clean the recovery tank. Ensure the float valve moves freely and the lid seals correctly. Reinstall both clean and dirty water tanks firmly.
• Check hose and nozzle: Detach the hose and nozzle. Use a flexible brush or straightened coat hanger (with smooth end) to gently push out clogs.
• Inspect float shutoff: If the float in the recovery tank is stuck in the up position, the unit will sense a full tank. Clean and free the float mechanism.
• Test without hose: Run the unit briefly with the hose removed (if allowed by the design). If suction is strong at the inlet, the blockage is in the hose or nozzle.
• Sensor issue: If airflow is normal but E06 persists, the airflow sensor or its wiring on the control board may be defective and require replacement.