Error 450 means the clean water tank on the dock is missing. The fluid reservoir in the dock has been removed, and replenishment is not possible. Remove and reinsert the dock tank, making sure it is full.
1. Completely remove the clean water tank from the dock.
2. Fill water to the maximum level.
Optional - Roomba® Max 705 Combo only - Fill the solution concentrate tank with StayClean™ Mopping Concentrate for Roomba® Combo Robots.
Optional - Roomba® plus 675, Max 775, or Max 875 Combo - Fill the solution concentrate tank with StayClean™ Mopping Concentrate for Roomba® Combo Robots.
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Roomba® Plus 675 Combo
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Roomba® Max 875 Combo
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IMPORTANT: The solution reservoir is meant for the StayClean™ Mopping Concentrate Solution ONLY. Do NOT use other solutions in this reservoir. Any other compatible solutions should be added directly to the clean water tank. Or, you may opt to dose the water reservoir with part water, part approved compatible cleaning solution. A full list of compatible cleaning solutions can be found here.
3. Fully re-insert the tank back into the dock.
4. Ensure the robot is securely and properly placed on the dock, making contact with the charging ports.
5. Close and re-open the app. Then try running the robot again.
If you performed all troubleshooting steps but your dock still does not work properly, please contact iRobot® Customer Care.
For expedited service, please have the following ready:
