The answer to 'dimmer switch not working' is that there are several common causes, including a faulty dimmer switch, loose wiring connections, or a problem with the light fixture itself. Symptoms may include the switch not responding when adjusted, the lights flickering or not dimming properly, or the switch feeling hot to the touch.
Some basic troubleshooting steps you can try include checking the switch and wiring for any visible damage, ensuring the switch is properly installed and the wiring is secure, and testing the light fixture with a different bulb. However, if the issue persists or you are not comfortable working with electrical components, it is best to call a licensed electrician to diagnose and repair the problem safely.