The answer to 'ceiling fan installation making buzzing noise' is that a buzzing ceiling fan is usually caused by a loose or improperly installed fan. This can be due to several common issues, such as a loose mounting bracket, a wobbling fan blade, or a problem with the motor or wiring.
If your ceiling fan is making a buzzing noise, first try tightening the mounting hardware and ensuring the blades are properly balanced. If the issue persists, you may need to check the wiring connections or have the fan's motor inspected. In some cases, the fan may need to be replaced if the internal components are worn or damaged.