failure mode
FM-07: The Trigger Lock-Off Button Is Stuck Or No Longer Blocks The Trigger
The lock-off cannot be pressed to allow the trigger, does not return, or lets the trigger move without a deliberate lock-off action.
Diagnostic overview
The lock-off cannot be pressed to allow the trigger, does not return, or lets the trigger move without a deliberate lock-off action.
Likely Root Causes
- Sawdust or impact damage is jamming the external button
- Lock-off spring, button, or housing guide is broken or displaced
- Trigger or switch housing is cracked or distorted
- Internal switch assembly has failed
Quick Checks
- With the battery removed, the trigger is positively blocked at rest and moves only while the lock-off is deliberately operated.
Repair Preview
- Remove the battery before testing the lock-off, and keep fingers away from the trigger until power is removed.
- - Inspect the button and surrounding housing for cracks, binding, packed sawdust, or a button that does not return - clean externally with a dry brush or dry
- With no battery installed, press and release the lock-off several times while confirming that the trigger is blocked at rest and moves only during delibera
- - If the control remains stuck, broken, or unable to block the trigger, do not reinstall the battery - route the complete saw for authorized switch and housin
This is a preview of the troubleshooting guidance included in the full repair manual.
Common Fixes
- Trigger lock-off or switch assembly
- Trigger lock-off and trigger switch
Related symptoms
The Trigger Lock-Off Button Is Stuck Or No Longer Blocks The Trigger
The lock-off cannot be pressed to allow the trigger, does not return, or lets the trigger move without a deliberate lock-off action.
Included in the full manual
- root cause analysis
- tools needed
- step-by-step repair procedure
- diagrams
- exploded views
- post-repair checks
Public pages show a preview only. Purchase the full manual to download complete repair steps, diagrams, and verification procedures.