Drum Not Rotating During Wash? Agitation-Side Faults Explained

On many machines the wash and spin use different drive ratios and, on top loaders, different gearbox paths. A stripped agitator drive or gearbox wash-path fails wash-only while spin stays healthy. The split symptom is the diagnosis.

In order of likelihood: wash timer segment, drive belt, wash motor capacitor, then the gear under the agitator. All testable in one visit; all inexpensive relative to machine replacement. The platform is a specialty of our semi-automatic repair service.

It means the motor has power but the drive isn't reaching the drum — belt, coupling or (on beltless platforms) a drive/sensor fault. Stop retrying; repeated stalls heat the motor. Book the diagnosis.

On most belted machines the belt is reachable through the back panel after unplugging: look for it seated on the motor pulley and the drum pulley. A healthy belt has visible ribs, no glazing and no rubber dust collecting beneath the machine. Cracks, a shiny glazed face, or a belt lying loose in the base each tell you the drive path is broken — see our belt replacement page for the fitment details.

The capacitor gives the motor its starting torque; as it weakens, the motor hums but can't begin turning, or turns sluggishly and stalls under load. Semi-automatics and belt-drive washers show this most. The drum rotated freely by hand doesn't contradict it — starting torque and running torque are different things. Capacitor testing and replacement is a same-visit job, covered on our capacitor page.

Top loaders route wash and spin through different gearbox paths. The agitator's wash drive can strip its gears or dogs while the spin path stays intact — an annoying but common split failure. That pattern alone largely rules out the belt and motor, focusing the repair on the gearbox or agitator drive, which our gearbox page handles.

Yes, usefully — a free-turning drum rules out a seized bearing and a jammed object, leaving the drive path: belt, coupling, capacitor or the motor's command side. If the motor hums under power, the fault is between motor and drum; if the motor is silent, the command path (timer, board, sensor) never asked it to run. That single hand-turn splits the suspect list in half.

Direct-drive platforms (LG's are the best known) have no belt or coupling, so their wash failures concentrate in the motor's position feedback and the drive electronics — a hum-without-rotation there usually means a sensor or drive-stage fault rather than anything mechanical. Belted machines fail mechanically first. The drive-loop fault family is decoded in our AC6 guide and LE guide.

On belt-driven and gearbox machines, yes — an overload stalls the wash motion temporarily, and the belt slips or the gearbox dogs disengage until the load eases. A one-off stop with an oversized load isn't a fault. But if normal loads now stall the drum where they didn't before, the belt has stretched or the coupling has worn to its limit, and the drive needs inspection before it fails outright. Stretched belts and worn couplings are same-visit swaps — see the pricing page.

When the motor is proven healthy (windings and capacitor test fine), the belt and coupling are intact, and the motor still receives no command during wash. Then the board's wash-relay output or the speed-sensing input is the remaining link — the board commands, the motor ignores. That's instrument territory, and our PCB repair service tests the output stage directly before any board is replaced.