E6
Lefant
Bumper Sensor Stuck / Collision Sensor Error
Robot vacuum reports E6 and refuses to start or stops immediately after starting.
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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
Front bumper jammed by debris, Bumper springs dislodged or broken, Bumper infrared or mechanical switch failure, Bumper wiring harness loose
How to Fix / Troubleshooting
Safety: Turn OFF the robot before manipulating the bumper.
- Step 1 – Check bumper movement: Gently press the front bumper in and release it. It should move freely and spring back evenly across its length.
- Step 2 – Remove debris: Inspect the gap between the bumper and the body. Remove any trapped dirt, cables, or plastic pieces using tweezers or compressed air.
- Step 3 – Tap to release: Lightly tap along the bumper with your hand to free any stuck internal switches.
- Step 4 – Power cycle: Turn the robot ON and start a cleaning cycle. If the bumper still appears stuck or E6 returns, internal switches or sensors may be damaged.
- Advanced check (optional): Remove the top cover and front shell (after taking out screws) to access the bumper sensor board. Verify that the micro-switches or IR sensors are firmly mounted and that the wiring harness is connected.
- Service: Replace the bumper sensor board or bumper assembly if physical damage or failed switches are found.
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Repair Difficulty
Medium
3/5
Required Part
Front Bumper Sensor Assembly
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