F3 displayed, vacuum refuses to start or stops immediately; often after a drop or impact.

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

Internal tilt sensor damaged by impact, Loose sensor connector on PCB, Firmware misinterpreting sensor data

Safety: Remove the battery.

Power cycle: Leave the battery out for 5–10 minutes, then reinstall and test.
Check for physical damage: Inspect the housing for cracks or signs of a drop. If the body is deformed, internal components may be misaligned.
Operate on a flat surface: Place the vacuum on a level floor and try starting it without moving it abruptly.

If F3 remains, the internal tilt/inertial sensor on the main PCB is likely damaged. PCB replacement is a technician-level repair.

Professional Required 5/5

Main Control PCB

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