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Models

Symptoms

Chain moves but does not cut
Motor runs, chain does not
The chain is hard to pull around the bar, the bar becomes unusually hot, or smoke appears without an electrical odor.
Saw dead with charged pack
The saw cuts slowly, makes fine dust instead of chips, chatters in the kerf, or must be pushed hard despite judging sharpness.
The reservoir contains oil but the chain stays dry, the primer gives no visible result, or the bar oil path remains dry.
The guide bar steers sideways in the cut or the kerf curves even though the workpiece is supported and the saw is held square.
The motor can be heard, but the chain remains stationary or only twitches while the trigger is held.
The lithium battery or charger shows abnormal heat, swelling, cracking, electrolyte, hissing, odor, sparks, or smoke.
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 chain hangs below the guide bar, can be pulled too far from the rail, or becomes loose again after adjustment.
The battery will not slide fully into the tool, click into place, stay latched, or release normally.
After chain or bar work, the cover will not sit flush, the bar will not align, or the locking knob cannot begin correctly.
A tool-free knob is frozen, cross-threaded, spins without effect, will not clamp the bar, or cannot hold the set tension.
Liquid entered the tool, the housing emits smoke or sparks, plastic melts, a burning odor appears, or wiring or contacts are exposed.
The chain travels around the bar but only rubs the wood, produces almost no chips, and will not enter the cut.
WORKLIGHT COMES ON, BUT THE MOTOR WILL NOT START
The motor can be heard, but the front output remains still in both directions with the bit removed.
The trigger returns normally and power drops, but the anvil repeatedly coasts instead of stopping promptly.
A straight bit traces a visible circle at no load instead of rotating on a stable centerline.

Failure Modes

part