A ceiling fan can abruptly stop working due to several distinct electrical and mechanical breakdowns. Common culprits include a tripped circuit breaker at your main electrical service panel, a loose wire nut connection inside the upper canopy box that has shaken loose from continuous vibrational stress, a blown internal thermal fuse inside the motor housing due to overheating, or a failed motor run capacitor. You can troubleshoot sudden power loss safely by turning off power at the breaker before inspection. You can verify that your corrective action is successful when resetting a tripped circuit breaker, securing loose canopy wiring, or replacing a failed capacitor restores normal blade rotation and reliable operational control to the ceiling fan unit.
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