When a ceiling fan's light fixture operates normally while the fan motor refuses to spin or turn on, it indicates that electrical power is successfully reaching the junction box, but the fault is isolated to the motor circuit. Common causes include a broken pull chain switch inside the motor housing, a failed motor run capacitor, a loose black motor power wire inside the canopy, or a burnt-out internal thermal fuse. You can troubleshoot motor faults safely by shutting off power at the circuit breaker. You can verify that your corrective action is successful when inspecting wiring connections, replacing a faulty pull chain switch, or swapping out a dead capacitor restores normal automatic blade rotation while keeping the light fully functional.
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