Hilti Mechanical Switch Wear

On/off switch feels loose or does not click; vacuum only starts intermittently

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

Worn switch contacts, Broken switch actuator, Dust contamination inside switch, Cracked handle housing around switch

Safety first: Remove the battery before manipulating the switch.

Operate switch repeatedly: Sometimes light oxidation can be cleared by cycling the switch several times (with battery removed).
Check for physical damage: Inspect the switch lever and surrounding plastic for cracks or looseness.
Do not spray cleaners: Avoid spraying contact cleaner into the switch without disassembly; it can carry dust deeper inside.
Professional replacement: A worn or broken switch should be replaced by a technician to ensure safe operation.

Medium 3/5

On/Off Switch Assembly

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