The answer to 'dimmer switch making buzzing noise' is that a buzzing noise from a dimmer switch is a common issue that can be caused by several factors. This can be due to an incompatible dimmer switch, a faulty switch, loose wiring, or even issues with the electrical circuit. The buzzing sound is often caused by electrical interference or a problem with the dimmer's internal components.
In many cases, the buzzing noise can be resolved with a simple fix, such as replacing the dimmer switch or tightening the connections. However, if the issue persists or you're unsure of the cause, it's best to have a licensed electrician inspect the problem to ensure it's resolved safely and properly.