E8
SEBO
Battery Overvoltage / Incompatible Pack Fault
Cordless SEBO vacuum displays eight red flashes and refuses to run; may occur immediately after inserting battery.
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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
Incorrect charger used causing overvoltage, non-original battery pack with higher voltage, failed BMS reporting incorrect voltage, control PCB voltage sensing fault
How to Fix / Troubleshooting
Safety first: Immediately stop using any battery suspected of overvoltage or swelling. Do not puncture or crush the pack.
- Confirm correct charger: Ensure you are using the SEBO-supplied charger with the correct voltage and connector. Discontinue use of any third-party chargers.
- Inspect battery physically: Remove the battery and check for swelling, cracks, or leakage. If any damage is present, do not reuse the battery; dispose of it at a battery recycling facility.
- Try another battery: If available, insert a known-good SEBO battery. If the vacuum operates normally, the original battery is faulty.
- Check for firmware/PCB issues: If multiple batteries trigger E8, the main control PCB may be misreading voltage. This requires professional testing and likely replacement of the PCB.
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Repair Difficulty
Medium
3/5
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