How to Fix / Troubleshooting

Safety first: Turn off the robot and remove the water tank. Do not operate the robot with water near open electronics.

Re-seat tank: Fill the tank as directed and insert it firmly until it clicks.
Inspect tank tabs: Ensure the mechanical tab or magnet that triggers the detection switch is intact.
Check for leaks: Look for water around the tank area; dry thoroughly if present.
Test pump: Start a mopping cycle and listen for the pump. If silent and E18 appears, the Water Pump Module or detection switch may be faulty.
Replace components: Replace the water tank if its hardware is damaged. If the pump or switch is defective, internal service is required.

Robot shows E18; water tank (for hybrid mop models) not detected or reports water system error.

Possible Causes