Cordless vacuum shows E20 and the LED pattern indicates a sensor fault, unit may start then stop

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.

Possible Causes

Loose connector between main PCB and sensor board, Damaged wiring harness, Failed I2C/SPI sensor (pressure, temperature, or accelerometer), Corrupted firmware

How to Fix / Troubleshooting

Safety first: Remove the battery before any inspection. Do not open the main body unless you are qualified.

Power cycle: Remove the battery for 5 minutes, then refit and test again.
Check for impact damage: If the vacuum was dropped, internal sensor boards or connectors may have been dislodged.
Limited user repair: Internal sensor bus faults require access to the PCB and diagnostic tools. If E20 persists after a power cycle, arrange professional service.

Repair Difficulty

Professional Required 5/5

Required Part

Main Control PCB and Sensor Board

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