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Why are my lights flickering?

Scale is everything with flicker: one bulb is a bulb problem, one room is a circuit problem, the whole house is a service problem — and the whole-house version can involve the utility and deserves fast attention.

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Snap a photo or describe what you see and the FinderlyFix assistant tells you what is likely going on, before you spend anything.

What it usually is

  1. One light: the bulb, the dimmer, or the socket

    LEDs flicker on dimmers not rated for them, bulbs loosen with vibration, and old sockets lose spring tension. Swap the bulb first; pair LED-rated dimmers with LED bulbs.

  2. One circuit: a loose neutral or worn switch

    A whole room flickering together — especially when something on the circuit kicks on — suggests a loose connection at a device or junction on that run.

  3. Whole house dims when big loads start

    A brief dip when the AC or dryer starts is voltage sag from inrush current; pronounced or worsening dips deserve a look at the panel and connections.

  4. Whole house flickers at random: a failing service neutral

    Random brightening AND dimming across the house — lights surging brighter is the distinctive part — can mean a deteriorating neutral at the service. This is the serious one: it can put 240V across 120V circuits.

Safety first: Lights surging noticeably brighter across the house, or flicker with any burning smell at the panel, is an urgent service-neutral concern — call an electrician promptly and mention those exact symptoms.

What you can check yourself

Establish the scale first. Reseat or swap the affected bulb; note dimmer compatibility. For a room, note what else runs when it flickers. For whole-house patterns, watch whether lights ever surge brighter — and log when it happens.

When it’s a job for a pro

Circuit-level flicker means opening devices and junctions to find the loose point — electrician work by definition. Whole-house randomness with brightening is a same-week call, and the utility should check their side of the service too.

Bulb and dimmer fixes are under $50 DIY; hunting a loose circuit connection typically runs $150 to $400; service-entrance repairs are quoted after inspection and shared with the utility where their side is at fault.

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