When a ceiling fan turns on and emits a humming noise or shows electrical power is active, but the blades refuse to spin on their own, it typically indicates a failed motor run capacitor, seized or dry motor bearings, or a heavy mechanical obstruction. The capacitor provides the crucial electrical phase shift required to jumpstart the AC induction motor; when it degrades, the motor lacks rotational torque. You can troubleshoot startup failures safely by shutting off power before inspection. You can verify that your corrective action is successful when shutting off the breaker, replacing a dead motor capacitor matching the exact microfarad rating, or clearing dust debris restores automatic, smooth blade rotation without needing manual pushes.
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