Vacuum runs but the motor speed surges up and down, and E8 appears on the display or LEDs flash in a repeating pattern.

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

Faulty motor speed sensor on main motor, Loose motor connector, Damaged control PCB, Carbon buildup or wear on motor commutator (for brushed motors)

How to Fix / Troubleshooting

Safety: Remove the battery before inspection.

Check airflow and load:

Ensure filters and airways are clean so the motor is not being overloaded.

Inspect connections (if accessible):

If the design allows user access to the motor compartment cover, check that the motor connector is firmly seated.

If the error remains, the motor speed feedback circuit or the motor itself is likely defective. This requires disassembly of the motor housing and replacement of the motor assembly or PCB by a qualified technician.

Repair Difficulty

Professional Required 5/5

Required Part

Main Suction Motor Assembly

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