failure mode
FM-03: FM-03 TOOL POWER IS WEAK, SURGES, OR DROPS WITHOUT A COMPLETE CUTOFF
FM-03 TOOL POWER IS WEAK, SURGES, OR DROPS WITHOUT A COMPLETE CUTOFF
Diagnostic overview
FM-03 TOOL POWER IS WEAK, SURGES, OR DROPS WITHOUT A COMPLETE CUTOFF
Likely Root Causes
- The battery is not fully charged or is at an extreme temperature
- Contact resistance from dirt, wear, or damage limits current
- The bit, attachment, fastener, or work interface is binding, dull, damaged, or overloaded
- The sealed cells or internal links have lost power capability
- The tool motor or controller is weak
Quick Checks
- The tool runs smoothly at expected light-load power, or the continuous weak-output source is conclusively isolated.
Repair Preview
1.
This is a preview of the troubleshooting guidance included in the full repair manual.
Related symptoms
The tool continues to run but power is continuously low, uneven, or surging instead of stopping completely.
The tool continues to run but power is continuously low, uneven, or surging instead of 1. Stop the tool, remove the battery, and inspect the pack for heat, swelling, damage,
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.