The answer to 'why is my dimmer switch not working' is that there are several common causes, including a faulty dimmer switch, incorrect wiring, or compatibility issues with the light bulbs. Symptoms may include the switch not turning the lights on or off, flickering lights, or the switch feeling loose.
Some potential solutions include checking the wiring, replacing the dimmer switch, or ensuring the light bulbs are compatible with the dimmer. However, if you are not comfortable working with electrical systems, it's best to call a licensed electrician to diagnose and fix the issue to avoid the risk of electrical shock or fire.