You are sitting in your living room in Cumming, watching TV, and the lights flicker for a second. Maybe two. Then they go back to normal. It happens again an hour later. Is it a ghost? Probably not. Is it something to worry about? It depends.
Flickering lights are one of the most common electrical complaints I hear from homeowners across Forsyth County. Sometimes the cause is completely harmless and takes 30 seconds to fix. Other times, flickering lights are a warning sign of a serious electrical problem that could lead to a fire if ignored. The trick is knowing the difference.
Here are the five most common causes of flickering lights in your home, ranked from least serious to most serious, along with guidance on when you can handle it yourself and when you need to call a licensed electrician.
1. Loose or Faulty Light Bulb
This is the most common—and least concerning—cause of flickering lights. A bulb that is not fully screwed into its socket will have an inconsistent connection, causing it to flicker intermittently. This is especially common with older lamp-style fixtures where the bulb can gradually loosen over time from vibration or being bumped.
Another variation of this is a bulb that is simply going bad. Incandescent bulbs flicker near the end of their life as the filament degrades. LED bulbs can flicker if they are low quality or incompatible with the fixture or dimmer switch they are connected to.
DIY or call a pro? This is a DIY fix. Turn off the light, let the bulb cool, and make sure it is fully seated in the socket. If the bulb is old, replace it. If you are using LED bulbs and they flicker, try a different brand—not all LEDs are created equal. Look for bulbs rated as "dimmable" if they are on a dimmer circuit.
2. Overloaded Circuit
Do your lights flicker or dim briefly when the air conditioner kicks on? What about when the washing machine starts its spin cycle or the microwave fires up? If the flickering coincides with a large appliance turning on, you are likely dealing with an overloaded circuit or a momentary voltage drop.
Large appliances draw a significant amount of current when they start up—often much more than their running wattage. An air conditioning compressor, for example, can draw 3 to 5 times its normal running current during startup. If your lights are on the same circuit, or if your overall electrical panel is near capacity, this startup surge can cause a brief voltage dip that makes the lights flicker or dim for a moment.
A brief, occasional flicker when a major appliance starts is fairly normal, especially in older homes with smaller electrical panels. However, if the flickering is severe, prolonged (more than a second or two), or happens frequently, it indicates that your electrical system is struggling to keep up with demand.
DIY or call a pro? If the flickering is brief and only happens when a large appliance starts, it is probably not an emergency—but it is worth having an electrician evaluate your panel. You may benefit from a dedicated circuit for the appliance causing the issue, or your panel may need an upgrade. If the flickering is severe or getting worse, call a licensed electrician. This is not something to ignore long-term, especially in Georgia summers when your AC is running hard.
3. Loose Wiring Connections
This is where flickering lights go from annoying to dangerous. Loose or deteriorating wiring connections are one of the leading causes of electrical fires in residential homes. When a wire connection becomes loose—at an outlet, switch, junction box, or inside your electrical panel—it creates resistance. That resistance generates heat. Over time, that heat can melt insulation, char surrounding materials, and eventually ignite a fire.
Signs that loose wiring may be causing your flickering lights include:
- Lights that flicker randomly without any obvious trigger (no appliance turning on)
- Flickering that is limited to one specific room or section of the house
- Outlets or switches that feel warm to the touch
- A burning smell near outlets or switches
- Discoloration or scorch marks on outlet cover plates
- Buzzing or crackling sounds coming from outlets, switches, or the panel
Loose connections can develop over time in any home, but they are especially common in homes that are 20 or more years old, homes where previous electrical work was done by unqualified individuals, and homes with aluminum wiring (common in homes built in the late 1960s and early 1970s).
DIY or call a pro? Call a licensed electrician immediately. Do not attempt to diagnose or repair loose wiring yourself. If you notice any of the warning signs listed above—especially warmth, burning smells, or discoloration—stop using that circuit and call for service right away. This is a fire hazard, and it is not something that can wait.
4. Outdated Dimmer Switches
If your lights only flicker when they are on a dimmer switch, the dimmer itself is likely the culprit. This is an extremely common issue in homes across Cumming and Forsyth County, and it almost always comes down to one of two problems.
First, many older dimmer switches were designed for incandescent bulbs. When homeowners upgrade to LED bulbs (which draw far less wattage), the old dimmer does not know what to do with the reduced load. The result is flickering, buzzing, or lights that do not dim smoothly.
Second, some dimmer switches have minimum load requirements. If the total wattage of the LED bulbs on the circuit is below the dimmer's minimum, the dimmer cannot maintain a stable output, and the lights flicker.
The fix is straightforward: replace your old dimmer switches with modern LED-compatible dimmers. Brands like Lutron Caseta, Leviton Decora, and GE make excellent LED dimmer switches that eliminate flickering and provide smooth, consistent dimming.
DIY or call a pro? Replacing a dimmer switch is a manageable DIY project for someone who is comfortable working with basic electrical wiring and knows to turn off the breaker first. However, if you are not confident working inside an electrical box, have a licensed electrician do it. It is a quick and inexpensive job for a pro. Also, if replacing the dimmer does not solve the flickering, there may be a deeper wiring issue that needs professional diagnosis.
5. Problems at the Electrical Panel or Utility Connection
If lights flicker throughout your entire home—not just in one room or on one circuit—the problem may be at the main electrical panel or at the utility connection to your home. This is the most serious potential cause of flickering lights and requires immediate professional attention.
Several things can go wrong at this level:
- Loose main connections: The main breaker or the connections where the utility feed enters your panel can become loose over time. These carry the full electrical load of your home, so a loose connection here generates significant heat and is an extreme fire hazard.
- Corroded or damaged meter base: The meter base where Georgia Power connects to your home can corrode, especially in Georgia's humid climate. A poor connection at the meter base can cause voltage fluctuations throughout the house.
- Failing main breaker: Main breakers can wear out over time. A failing main breaker may not maintain consistent contact, causing intermittent flickering or power fluctuations.
- Utility-side problems: Sometimes the issue is not in your home at all. A damaged service drop (the wire from the utility pole to your house), a failing transformer, or issues at the utility pole can all cause whole-house flickering.
- Neutral wire problems: A loose or broken neutral wire—either at your panel or at the utility connection—is particularly dangerous. It can cause voltage imbalances between the two legs of your electrical service, potentially sending 240 volts to circuits and appliances designed for 120 volts. This can destroy electronics and appliances and is a serious fire and safety hazard.
DIY or call a pro? Call a licensed electrician right away. Whole-house flickering is never normal and should not be ignored. If the problem turns out to be on the utility side, your electrician can coordinate with Georgia Power to get it resolved. Do not open your electrical panel yourself—the main lugs carry full utility power even when the main breaker is off.
When to Take Flickering Lights Seriously
To summarize, here is a quick reference for when flickering lights need professional attention:
- Single bulb flickering: Probably just needs to be tightened or replaced. DIY fix.
- Flickering when appliances turn on: Common but worth an evaluation if it is severe or worsening.
- Random flickering in one area with warm outlets or burning smells: Call an electrician immediately. Potential fire hazard.
- Flickering only on dimmer switches: Replace with LED-compatible dimmers. DIY or quick pro job.
- Whole-house flickering: Call an electrician immediately. Serious electrical issue.
Bottom line: A single loose bulb is nothing to lose sleep over. But if your lights flicker regularly without an obvious cause, or if you notice any signs of heat, burning, or discoloration at outlets and switches, do not wait. Electrical fires can develop inside walls where you cannot see them, and by the time you notice, the damage is done.
