Hilti Speed Control Failure

Vacuum runs only at one speed; power selector has no effect

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

Defective speed selector switch, Broken mode selector knob, Faulty control PCB speed circuit, Disconnected selector wiring

Safety first: Remove the battery before manipulating controls.

Check selector movement: Ensure the power selector moves through all positions and clicks positively.
Clean around selector: Blow dust out from around the selector knob with compressed air.
Test function: Reinstall the battery and test each selector position. If speed does not change, the selector or PCB is faulty.
Professional repair: Replacement of the selector switch or PCB is required and should be done by a service center.

Medium 3/5

Power Selector Switch or Main Control PCB

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