Robot vacuum reports E3 and stops moving, wheels twitch but robot does not drive

Safety first: Turn OFF the robot and remove it from the dock. Work on a stable table or floor.

• 1. Inspect both drive wheels: Flip the robot over. Press each wheel up and down to check that the suspension moves freely. Rotate each wheel by hand; they should spin smoothly.
• 2. Remove debris: Use tweezers or a small brush to remove hair, carpet fibers, and dust from around the wheel axles and inside the wheel wells. Pay attention to the inner side of the wheel where hair often wraps.
• 3. Check for physical damage: Look for cracked wheels, broken suspension springs, or bent wheel brackets. Damaged parts can cause the wheel to bind.
• 4. Test on a flat surface: Place the robot on a hard, flat floor and power it ON. Start a cleaning cycle and watch the wheels. If one wheel does not turn or makes grinding noises, that wheel motor/gearbox is likely failing.
• 5. Advanced check (for experienced users): If comfortable opening the robot, remove the bottom cover (after removing screws) and inspect the drive wheel modules for broken gears or burnt smell. Replace the entire wheel motor module if damaged.

Warning: Disconnect the battery connector before removing internal covers to avoid short circuits. If you are not experienced with electronics, seek professional service for wheel motor replacement.