Moderate Risk

Flickering Lights

Flickering lights in your Connecticut home usually indicate a loose connection, overloaded circuit, or failing fixture. While a single flickering bulb is often a simple fix, flickering throughout your home can signal a serious wiring or panel issue that needs professional attention.

Flickering lights are one of the most common electrical complaints we hear from Connecticut homeowners. While sometimes the fix is as simple as tightening a loose bulb, persistent or whole-house flickering can indicate serious underlying problems that require professional diagnosis.

At Ergon Electric, we've resolved thousands of flickering light issues across 176 Connecticut communities. Our licensed electricians use professional diagnostic equipment to identify the exact cause and provide a lasting solution — not just a temporary fix.

Possible Causes

Loose bulb or fixture connection

Common

The most common and simplest cause. The bulb isn't fully seated in the socket, or the fixture wiring has loosened.

Overloaded circuit

Common

Too many devices on one circuit cause voltage drops when large loads kick on (vacuum, microwave, hair dryer).

Loose wire connections

Moderate

Wiring connections at switches, outlets, or junction boxes have loosened over time, creating intermittent contact.

Failing dimmer switch incompatibility

Moderate

Old dimmer switches designed for incandescent bulbs can cause LED bulbs to flicker. Requires an LED-compatible dimmer.

Outdated or undersized panel

Moderate

A 100A panel struggling to handle modern electrical loads can cause voltage fluctuations throughout the home.

Utility company voltage fluctuations

Less Common

Issues on the utility side can cause flickering throughout homes in a neighborhood. Check with neighbors.

Failing main breaker or bus bar

Less Common

A deteriorating connection at the main breaker or bus bar causes intermittent power delivery. This is a safety concern.

Damaged or deteriorating wiring

Less Common

Knob-and-tube, aluminum, or aging wiring can develop high-resistance connections that cause flickering and heat buildup — a fire risk.

What You Can Check

1Note which lights flicker — is it one fixture, one room, or the whole house?

2Check if the flickering correlates with turning on specific appliances

3Try tightening or replacing the bulb in a single flickering fixture

4Check if the dimmer switch is LED-compatible (if applicable)

5Ask neighbors if they experience similar flickering (utility issue)

6Check your electrical panel for any breakers that feel warm or look discolored

7If flickering is widespread or getting worse, call a licensed electrician

Call a Pro When You See

Flickering occurs in multiple rooms or throughout the house

Flickering is accompanied by a burning smell

Outlets or switches feel warm to the touch

Flickering started suddenly with no obvious cause

You see sparking at any outlet or switch

Breakers trip frequently alongside flickering

Your home has knob-and-tube or aluminum wiring

Your panel is a Federal Pacific, Zinsco, or Pushmatic brand

Get a Free Diagnosis (203) 945-7181

Safety Warnings

Never open your electrical panel unless you're a licensed electrician

Don't ignore persistent flickering — it can indicate a fire hazard

Don't overload circuits with power strips and extension cords

If you smell burning or see sparking, turn off the breaker and call immediately

Typical Cost

$150–$500 for diagnosis and simple repairs. Panel-related issues may cost $1,500–$4,000.

Get Your Free Estimate

Related Services

Residential Electrical Service

From $150

Panel Upgrades & Replacement

From $1,500

Whole-Home Rewiring

From $8,000

Lighting Design & Installation

From $200

Frequently Asked Questions

They can be. A single flickering bulb is usually harmless, but widespread flickering can indicate loose connections or overloaded wiring — both fire hazards. Get it checked if it persists.

This usually means the microwave shares a circuit with your lights, and the high startup current causes a momentary voltage drop. A dedicated circuit for the microwave will fix this.

Yes — LED bulbs can flicker if used with incompatible dimmer switches. Old dimmers designed for incandescent bulbs don't work well with LEDs. Upgrading to an LED-compatible dimmer usually solves this.

Yes — older homes (especially pre-1960) may have knob-and-tube or cloth-insulated wiring that deteriorates over time. Flickering in old homes warrants a professional inspection.

Free Estimates

Ready to Get Started?

Get a free, no-obligation estimate for your electrical project. Licensed electricians. Transparent pricing. Guaranteed satisfaction.

Schedule a Consultation (203) 945-7181

No obligation • No pressure • Transparent pricing always