The answer to 'dimmer switch dimming lights' is that a dimmer switch that is not properly functioning can cause lights to dim or flicker. Common causes include a faulty dimmer, incompatible light bulbs, loose wiring connections, or overloaded circuits. Symptoms may include lights that won't dim fully, flickering or pulsing lights, or buzzing or humming noises from the dimmer switch.
In many cases, troubleshooting and fixing a dimmer switch issue can be done as a DIY project. Start by checking the dimmer switch and light bulb compatibility, ensuring all connections are tight, and replacing the dimmer switch if faulty. However, if the issue persists or you are not comfortable working with electrical components, it's best to call a licensed electrician to diagnose and repair the problem safely.