Err 6
iRobot
Main Control Board Communication Error
Vacuum stops and displays “Err 6”; unit may shut down abruptly when switching power modes.
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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 wiring harness, Damaged main PCB, Firmware corruption, Faulty sensor bus connection between handle and motor body
How to Fix / Troubleshooting
Safety first: Turn the vacuum OFF, remove the battery, and disconnect from the charger before opening any covers.
- Perform a hard reset: Remove the battery for 2–3 minutes. Reinstall the battery, then hold the Power/Clean button for 20–30 seconds until the lights cycle.
- Check for flexing or damage: Gently flex the handle and body while the unit is off to feel for loose internal components. Do not force it.
- Update firmware (if supported): Connect the vacuum to the iRobot app via Bluetooth/Wi‑Fi and check for firmware updates. Install any available updates and retest.
- Inspect external connectors: Ensure the wand and motorized nozzle electrical connectors are clean and fully seated; poor connections can trigger communication errors.
- Service main board: If Err 6 persists after reset and firmware update, the main control board or internal harness likely needs replacement, which typically requires professional service.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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