Skip to content
Flickering lights are one of those things homeowners notice, worry about briefly, then forget — until it happens again. Our electrician Patrick was recently called to a Greer home where the kitchen lights had been flickering intermittently for about six months. The homeowner described it as “barely noticeable — like a quick blink.” When Patrick opened the outlet box behind the kitchen counter, he found a backstab wire connection that had worked loose and was arcing — the plastic housing around the connection point was already heat-discolored. Another few months and it could have started a wall fire.
Sometimes flickering is nothing. Sometimes it’s a warning sign. Here’s how our electricians tell the difference.
When Flickering Is Normal
Momentary dimming when large appliances start. When your AC compressor, heat pump, or dryer kicks on, it draws a surge of electricity that can cause a brief, slight dimming of lights on the same circuit or nearby circuits. This lasts less than a second and is normal – especially in older homes with smaller electrical panels.
During storms or high winds. Wind moves power lines, causing momentary interruptions in the utility feed. If the flickering coincides with weather events and affects the whole house equally, it’s likely a utility-side issue.
LED bulbs on dimmer switches. Not all LED bulbs are compatible with all dimmers. Incompatible combinations cause visible flickering. The fix: use LED-rated dimmer switches and LED bulbs listed as “dimmable.”
When Flickering Is a Problem
Consistent Flickering in One Area
Lights that flicker regularly in one room or on one circuit point to a loose connection somewhere in that circuit – at the switch, outlet, junction box, or breaker. Loose connections create resistance, which generates heat. Heat at an electrical connection is a fire risk.
Action: Call an electrician. This needs to be traced and corrected.
Flickering That Gets Worse Over Time
A problem that started as occasional and has become frequent indicates a connection that’s progressively loosening or a component that’s deteriorating. Wiring connections expand and contract with thermal cycling (heating up under load, cooling when idle), which can work screws and wire nuts loose over time.
Action: Don’t wait. The trend toward worse flickering means the connection is degrading and the fire risk is increasing.
Whole-House Flickering (Not Weather-Related)
If all lights in the house flicker simultaneously without a weather cause, the issue may be:
- Loose connection at the meter or service entrance – the utility connection to your home
- Failing main breaker – the breaker that feeds your entire panel
- Neutral wire issue – a loose or corroded neutral connection at the panel or meter base
Action: This is urgent. A loose neutral can cause voltage fluctuations that damage electronics and appliances throughout the home. Call an electrician immediately.
Flickering Accompanied by Other Symptoms
If flickering comes with:
- Burning smell – active arcing or overheating. Turn off the breaker and call immediately.
- Buzzing from outlets or switches – loose connection or failing device
- Warm switch plates or outlets – overheating. Stop using the outlet/switch.
- Tripping breakers – overloaded or faulted circuit
Any combination of these symptoms with flickering indicates a potentially dangerous electrical issue that needs same-day professional attention.
The DIY Check
Before calling, try these: 1. Tighten the bulb. A loose bulb in the socket is the simplest cause of flickering. 2. Try a different bulb. A failing bulb can flicker before it dies. 3. Check the dimmer compatibility. If LED bulbs flicker only on dimmed circuits, swap the dimmer for an LED-rated model.
If none of these resolve it, the issue is in the wiring – and that’s where a licensed electrician is needed.
Upstate SC Electrical Infrastructure
Many Upstate homes – particularly in Greenville, Spartanburg, and the surrounding areas – were built with 100-amp or 150-amp electrical service that’s now handling loads far beyond original design. AC systems, electric dryers, EV chargers, and home offices have increased demand significantly. Overloaded circuits and stressed connections are more common as a result.
If your home was built before 2000 and you’ve added significant electrical loads, a panel evaluation is a smart investment – even if your lights aren’t flickering yet.
YOUTUBE EMBED: AC Spring Tune – Waldrop Plumbing & Electric TV Commercial — @YallCallWally
Call Waldrop Plumbing Air Electric at (864) 536-0887 for an electrical evaluation.
RELATED POSTS:
- AC Won’t Quit Running → https://www.callwaldrop.com/blog/if-your-ac-wont-quit-running-wally-knows-whats-going-on-upstate-sc/
- How Long Should My HVAC System Last → https://www.callwaldrop.com/blog/how-long-should-my-hvac-system-last/
- Indoor Air Quality → https://www.callwaldrop.com/blog/clean-air-healthier-you-wally-talks-indoor-air-quality/
