When a washing machine's motor hums and runs actively, but the inner drum refuses to spin, the issue points to a mechanical disconnection between the motor and the drum. In belt-driven top-loaders, a snapped or slipped rubber drive belt is the primary culprit. In direct-drive models, a broken plastic motor coupling has likely sheared apart. You can troubleshoot drive systems easily by tilting the machine back to inspect components. You can verify that your repair is successful when replacing a snapped rubber drive belt or installing a new heavy-duty motor coupling restores mechanical engagement so the motor successfully turns the drum during spin cycles.
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