The answer to 'why is my dimmer switch' is that there could be a few common causes for a dimmer switch not working properly. This could include a faulty dimmer switch, loose wiring connections, overloaded circuits, or a problem with the light fixture itself.
Some common symptoms of a problem with a dimmer switch include the lights not dimming properly, the switch feeling hot to the touch, flickering or buzzing lights, or the switch not turning the lights on and off at all. The solution will depend on the specific issue, but may involve replacing the dimmer switch, tightening connections, or checking the circuit breaker.
For most dimmer switch issues, it's best to call a licensed electrician to diagnose and repair the problem, as working with electrical systems can be dangerous for homeowners without the proper training and experience. However, simple troubleshooting like checking connections or replacing the switch may be something a homeowner can do safely if they feel comfortable.