Why Do My Lights Flicker? Causes and Solutions

Flickering lights are one of the most common electrical complaints from Oregon homeowners. While a single flickering bulb is usually harmless, persistent or widespread flickering can indicate serious wiring problems that require professional attention. Here is a look at the most common causes and what you should do about them.

Loose or Faulty Light Bulbs

The simplest explanation is often the right one. A bulb that is not fully screwed in will flicker as the connection intermittently breaks. Try tightening the bulb. If it still flickers, try a new bulb. LED bulbs paired with incompatible dimmer switches are another frequent cause of flickering.

Incompatible Dimmer Switches

Older dimmer switches were designed for incandescent bulbs. When paired with LED bulbs, they can cause flickering, buzzing, or inconsistent dimming. The solution is to install LED-compatible dimmer switches that are rated for the type of bulbs you are using.

Loose Wiring Connections

Loose connections at switches, outlets, or junction boxes are a more serious cause of flickering. Over time, wire connections can loosen due to thermal expansion and contraction. Loose wiring creates resistance, which produces heat and increases fire risk. This type of problem requires a licensed electrician to diagnose and repair safely.

Overloaded Circuits

When a large appliance like an air conditioner or vacuum cleaner kicks on, it may briefly draw enough current to cause lights on the same circuit to flicker. Occasional brief dimming when major appliances start is normal. However, if it happens frequently or severely, your circuits may be overloaded and need additional dedicated circuits.

Voltage Fluctuations

Your home should receive a steady 120 volts from the utility. If voltage fluctuates significantly, lights will flicker and sensitive electronics may be damaged. Signs of voltage problems include lights that brighten unexpectedly, bulbs that burn out frequently, and appliances that malfunction. A whole-house surge protector can help protect against voltage spikes.

Faulty Main Service Connection

If lights flicker throughout your entire home, the problem may be at the main service connection where the utility power enters your house. This is the most serious potential cause, as it involves high-voltage connections that can arc, overheat, and start fires. This situation requires immediate professional attention.

When Is Flickering Dangerous?

Call an electrician right away if you notice any of these warning signs alongside flickering lights: a burning smell, warm or discolored outlets, buzzing sounds from your panel, or flickering that affects the entire house. These symptoms suggest wiring problems that pose a fire risk.

If your lights are flickering and simple fixes like tightening the bulb have not helped, call (877) 883-2383 to schedule a professional diagnosis. Our licensed Oregon electricians will identify the root cause and make the necessary repairs to keep your home safe. We also offer dedicated flickering light repair services.