Error 3 means Roomba i Series is on an obstacle or an uneven surface and the right wheel is stuck. If this is the case, lift Roomba off the floor, place it in the center of the room and restart the clean cycle. If this error occurred on a flat surface, check the right wheel for obstructions.
Use a Virtual Wall® to keep Roomba away from problem areas.
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Push the wheels up and down several times and shake out any loose debris that may be trapped in the wheel well.
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Briskly turn both wheels by hand and make sure they turn freely and that each wheel exhibits the same amount of resistance.
If issue persists, you may need a new right wheel module. Please visit the iRobot Store - Parts and Accessories or use an authorized retailer to order a part. If you believe you're in warranty, please contact iRobot Customer Care.
