Why Are My Lights Flickering? 7 Common Causes (and When to Call an Electrician)

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If your lights are flickering randomly, you’re not alone. At Ark Electric, we get calls weekly from homeowners in Northfield, Tilton, Canterbury, and surrounding NH towns asking what’s going on—and whether it’s dangerous.

While some flickering can be harmless, others may signal serious electrical problems that could pose a fire or safety risk.

Let’s break down the most common causes.

1. 

Loose Light Bulb

It may sound obvious, but always check if the bulb is screwed in properly. A loose connection can break the electrical path and cause flickering.

2. 

Faulty Bulb (Especially LED or CFL)

Some LED and CFL bulbs don’t work well with older dimmer switches. Try replacing the bulb or using a compatible one.

3. 

Overloaded Circuit

Do your lights flicker when you turn on the microwave or dryer? That’s a sign your circuit may be overloaded—and needs an upgrade or redistribution.

4. 

Loose Wiring or Connections

This is one of the most dangerous causes. Loose wires can lead to arcing, which can cause a fire. If flickering is consistent or getting worse, call an electrician right away.

5. 

Outdated Electrical Panel

Old fuse boxes or 100-amp panels often can’t handle today’s demands. If your home hasn’t had an electrical upgrade in 20+ years, this could be the cause.

6. 

Utility Service Issues

Sometimes the problem is on the utility company’s end—especially if neighbors are experiencing similar issues. Still, it’s best to have a licensed electrician inspect your panel first.

7. 

Voltage Fluctuations

If you notice flickering lights and dimming appliances or blinking digital clocks, your home might be experiencing unsafe voltage swings.

When to Call Ark Electric

Don’t wait until it’s too late. If your lights flicker often or without explanation, let our licensed team take a look. We specialize in:

  • Electrical troubleshooting
  • Panel upgrades
  • Circuit redistribution
  • Safe, code-compliant fixes

We’re local, reliable, and trusted by families across central NH.

📍 Based in Northfield, NH — Serving Tilton, Laconia, Belmont, and beyond

📞 Call today for a safety inspection

🌐 arkelectricnh.com

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