Error 11
iRobot Internal Module Communication Failure

Robot vacuum says “Error 11: Communication error” or similar and will not start or complete cleaning.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Loose internal cable between main board and sensor modules, Damaged main board connector, Firmware mismatch after partial update, Corroded internal connectors

How to Fix / Troubleshooting

Safety first: Turn off the robot and remove it from the charger. Do not open the robot if it is under warranty; contact iRobot first.

Steps to resolve (user level):

  • Soft reset: Perform a soft reset via the CLEAN button sequence for your model.
  • Check for firmware updates: Dock the robot, ensure strong Wi‑Fi, and use the iRobot HOME app to check for and install updates.
  • Battery reseat (if accessible): On models with a removable battery door, remove the battery for 1–2 minutes, then reinstall firmly and restart the robot.

Advanced (technician level): Open the robot, inspect ribbon cables and connectors between the main board, sensor boards, and wheel/brush modules. Reseat any loose connectors and check for corrosion.

When to replace parts: Persistent Error 11 usually indicates a failing main board or sensor board that must be replaced.

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Repair Difficulty

Professional Required 5/5

Required Part

Main Control Board / Internal Harness
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