Why Are My Lights Flickering?

Flickering lights are often caused by a loose connection somewhere in the electrical system, a faulty light bulb, or an appliance drawing too much power on the circuit. While sometimes harmless, persistent flickering can indicate a serious electrical issue like an overloaded circuit or failing wiring that requires professional attention.

Can a simple light bulb cause flickering?

Yes, a faulty or incompatible light bulb is one of the most common and easiest-to-fix reasons for flickering lights. If you're using an LED bulb, ensure it's rated for dimmable fixtures if your switch is a dimmer, as non-dimmable LEDs can flicker when connected to a dimmer. Older incandescent bulbs can also flicker if the filament is loose or near its end of life. Try replacing the bulb in the affected fixture to see if the flickering stops. If it's only one light fixture flickering, the issue might be localized to the fixture itself or its switch.

Are loose connections dangerous?

Loose connections, whether at the light switch, outlet, light fixture, or even within the electrical panel, are a significant cause of flickering lights. These connections can create resistance, generate heat, and potentially lead to arcing, which is a serious fire hazard. If you experience flickering lights in multiple fixtures, or if the flickering is accompanied by buzzing sounds, burning smells, or scorch marks around outlets or switches, a loose connection is highly probable and needs immediate inspection by a qualified electrician. This is particularly critical in older homes where wiring may be deteriorating.

Can appliances cause lights to flicker?

Large appliances that draw a lot of power when they start up, such as refrigerators, air conditioners, washing machines, or even EV chargers, can cause lights on the same circuit to flicker momentarily. This is usually due to a temporary voltage drop as the appliance's motor kicks in. If the flickering is brief and only occurs when a specific appliance starts, it might be normal. However, if the flickering is severe or prolonged, it could indicate that the circuit is overloaded. Modern electrical codes, like the 2023 National Electrical Code (NEC) adopted in California, specify dedicated circuits for high-draw appliances to prevent such issues and ensure safety. If you're experiencing significant flickering when using an appliance, especially an EV charger, it's wise to have an electrician assess the circuit capacity and potentially install a dedicated circuit. Circuit King Electric can assist with proper installation of EV charging equipment and dedicated circuits.

What if the flickering affects my entire house?

If all the lights in your home are flickering, or if multiple circuits are affected simultaneously, the problem likely lies with your main electrical service. This could be due to a loose connection at the main electrical panel, a fault in your utility company's lines, or issues with your home's meter. These situations are critical and can indicate a major electrical problem, potential fire hazards, and possible damage to sensitive electronics. In such cases, contact a licensed electrician immediately and, if necessary, your utility company. Do not attempt to inspect the main panel yourself without professional knowledge and safety precautions.

When to call a licensed electrician

It's time to call Circuit King Electric if:

• Flickering occurs in multiple rooms or throughout the entire house.
• The flickering is accompanied by buzzing, humming, burning smells, or discolored outlets/switches.
• Lights flicker even after replacing bulbs.
• High-power appliances consistently cause severe flickering.
• Your electrical panel makes unusual noises or is hot to the touch.
• You suspect outdated or faulty wiring, especially in older homes.

For any persistent or concerning flickering issues, especially those that could indicate an electrical hazard, it is always best to consult with a professional. Addressing these issues promptly not only ensures the safety of your home and family but also prevents further damage to your electrical system.

Circuit King Electric is a licensed C-10 electrical contractor, CSLB License #1156236, serving San Pedro and the South Bay Area (Torrance, Rancho Palos Verdes, Carson, Long Beach, Lomita, Harbor City), Monday through Friday 8am-6pm, call or text (424) 368-5555. For detailed information on our services, visit our /services page. You can easily schedule an appointment via our /book page or find out if we serve your specific area on our /service-areas page. To get in touch directly, please visit our /contact page.