One common reason a fan might stop working is that the motor has burned out. Another possible reason is that the blades have become clogged with dust, dirt, or other debris. If your fan isn't working, the first thing you should do is check to see if it's plugged in properly. If it is plugged in and still not working, then you'll need to replace the motor or the blades.
The three most common reasons for a fan to stop working are: 1. A blown fuse or tripped breaker in the home's electrical system. 2. A problem with the fan's motor. 3. A clogged fan blade or obstruction in the fan's housing.