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Models

Symptoms

The motor can be heard, but the front output remains still in both directions with the bit removed.
Charger green LED stays on
A straight bit traces a visible circle at no load instead of rotating on a stable centerline.
The motor runs normally, but the LED is dead, dim, or intermittent with trigger use.
The bit passed initial insertion, but backs out, falls free, or loses drive while the chuck body stays secure.
The trigger returns normally and power drops, but the anvil repeatedly coasts instead of stopping promptly.
After a normal full charge, the battery loses a large amount of indicated charge or usable low-load runtime while stored by itself in a cool, dry place.
WORKLIGHT COMES ON, BUT THE MOTOR WILL NOT START
The reservoir contains oil but the chain stays dry, the primer gives no visible result, or the bar oil path remains dry.
The saw cuts slowly, makes fine dust instead of chips, chatters in the kerf, or must be pushed hard despite judging sharpness.
Saw dead with charged pack
The bar is bent or cracked, chain links or cutters are broken, or the guide-bar scabbard is split, missing, or will not stay on.
The cool drill begins to run, then stops during a brief no-load test or light work.
BATTERY WILL NOT SEAT, LATCH, OR RELEASE
Chuck clicks while tightening
The drill runs steadily but drills slowly or cannot drive a normal fastener with correct setup.
The tool, pack, or charger becomes unusually hot, or protection repeatedly stops operation.
A secure straight bit and clear work do not eliminate harsh no-load sound or vibration.
BATTERY WILL NOT CHARGE
The chuck opens and closes, but the bit slips, pulls out, or ejects during normal work.

Failure Modes

part