What to Do About Flickering Lights on a Dimmer Switch

Flickering lights are a common and frustrating problem in many Northern Virginia homes. When this issue occurs on a circuit with a dimmer switch, it often points to a specific set of causes. While sometimes a simple fix, a persistent flicker can also be a sign of a more serious underlying electrical issue. Understanding the possible reasons for the flicker can help you determine whether you can fix it yourself or need to call an expert.

Common Causes of Flickering Lights on a Dimmer

1. Incompatible Bulbs and Dimmer: This is the most frequent cause. Not all LED or CFL bulbs are compatible with all dimmer switches, even if the packaging says “dimmable.” Older dimmers, in particular, may not work correctly with new LED technology. Using an incompatible bulb can cause it to flicker, hum, or not dim properly.
2. The Dimmer Itself is Faulty: Over time, dimmer switches can wear out or become defective. A faulty dimmer may not be able to regulate the voltage correctly, causing the lights to flicker or turn off unexpectedly.
3. Loose Connections: A loose wire connection at the dimmer switch, the light fixture, or even at the electrical panel can cause an inconsistent power supply, leading to a flicker. A loose connection can also generate heat and is a potential fire hazard.
4. Overloaded Circuit: The circuit may be overloaded with too many lights or other devices. When the load on the circuit fluctuates, the dimmer may struggle to provide a consistent voltage, causing the lights to flicker.

When to Call a Professional Electrician

While you can try to fix the issue by replacing the bulb with a known compatible one, if the problem persists, it’s time to call our professionals. You should contact a licensed electrician if:

• The flicker continues after you have replaced the bulb.
• The dimmer switch is warm to the touch.
• You hear a buzzing or humming sound from the switch or the light fixture.
• The flickering is occurring on multiple circuits in your home.
• You suspect the wiring is old or has loose connections.

Our licensed electricians can diagnose the root cause of the problem and safely replace the faulty dimmer, tighten loose connections, or install a new dimmer that is fully compatible with your bulbs. Don’t risk a fire hazard with a DIY solution. For reliable electrical work in Northern Virginia, contact McLean Electric Co.