How to Fix Flickering Lights

Flickering in one fixture is usually a loose bulb, an incompatible LED on a dimmer, or a worn switch: easy fixes. Flickering across many rooms, or lights that dim when big appliances start, points to a loose connection in the panel or service, which needs an electrician. Diagnosing and fixing a loose connection typically costs $150–$300.

Fix this weekDIY: Easy10–30 minutes for bulb and dimmer checksPro: $150–$300

Last reviewed September 2026

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Check 1 of 12Testing: Flickering lights

Try this

Tighten or replace the bulb

With the light off and cool, tighten the bulb, then try a new one.

Signs it's this problem

One light or fixture flickers
LED bulbs flicker on a dimmer switch
Lights dim when the AC, microwave or washer starts
Lights flicker in several rooms at once

Why it happens

Light output drops whenever voltage dips. A loose bulb or old dimmer causes local flicker; a loose connection at a switch, fixture, panel or the utility's service line causes voltage swings that show up across the house, and loose connections heat up.

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How to fix it, step by step

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1.Turn the light off, let the bulb cool, and tighten it in the socket.
2.Swap in a new bulb; if you use LEDs on a dimmer, make sure they're labeled dimmable and the dimmer is LED-compatible.
3.Try another bulb in the same fixture: if the flicker follows the fixture or switch, the switch or fixture wiring is worn.
4.Note whether lights dim when a large appliance starts. A brief dip is normal; a big or lasting dip isn't.
5.If several rooms flicker, ask neighbors: if they see it too, call your utility company.
6.If it's just your house, or you smell burning or hear buzzing, call an electrician to check the panel and service connections.

Safety: Flicker across the whole house can mean a loose main or neutral connection, which can damage appliances and overheat. Don't open the main panel yourself.

How to Fix Flickering Lights cost

US national ranges for professional work, including labor and materials
Job	Typical cost
Diagnose and fix a loose connection	$150–$300
Electrician hourly rate	$50–$130/hr
Replace a dimmer or light switch	$80–$200

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Repair typeQuote amount (USD)

Typical professional price for this job: $150–$300

Common questions

Are flickering lights dangerous?

A single loose bulb isn't, but flicker throughout the house, or with buzzing or a burning smell, can mean a loose connection that overheats. Have an electrician check it promptly.

Why do my LED lights flicker?

Most often the dimmer isn't compatible with LEDs, or the bulbs aren't dimmable. Replacing the dimmer with an LED-rated model usually fixes it.