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Lights flickering: one fixture vs whole house (very different problems)
One flickering fixture is usually a bulb, socket, or dimmer mismatch. Whole-house or many-room flickering is a service-level problem (loose neutral, utility issues) that needs a pro fast.
What to do, in order
- One fixture: swap the bulb (LED + old dimmer = classic flicker; check dimmer compatibility list), then check the bulb sits tight.
- One room: try another lamp on the same outlet — if it flickers too, the circuit/switch is the issue; a worn switch is a $2 part.
- Whole house subtly when big appliances start (AC, dryer): voltage sag — often normal-ish but worth a pro measurement if severe or new.
- Whole house rapidly/randomly: check with neighbors (utility-side) then your main panel — a loose service neutral is the dangerous scenario; call an electrician same-day.
- Flicker + dimming + breaker buzz together: stop using high-load circuits and get the panel inspected now.
Red flags — stop and call a pro
- Flickering with any burning smell — shut the main, electrician now
- Sizzling/buzzing in the panel — arcing; don't open it yourself, call
- Lights brighten when other loads turn ON — open neutral; fire risk, urgent
Prevention
Use dimmer-compatible LEDs, replace worn switches on sight, and schedule a panel inspection for any home past 30 years.
This guide is maintained by the ee.ltd editorial team — reviewed for 2026. Browse all home repair guides or compare electrician costs.
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What this repair typically costs
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