Light Switch Buzzing
An audible buzzing or humming noise coming from a light switch when the light is on.
What Is Causing This?
- 1Incompatible dimmer switch with LED bulbs
- 2Loose wiring inside the switch
- 3Worn switch mechanism
How Urgent Is This?
This should be fixed in the coming weeks. Leaving it may allow the problem to worsen and cost more to repair.
What Needs to Be Done
An electrician will inspect the switch, check wiring connections, and replace the switch or upgrade the dimmer to one compatible with your bulbs.
How Much Will It Cost?
National average estimate
Labour: £512 – £1,090 | Materials: £144 – £450
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Prices are estimates based on typical UK rates. Actual costs depend on the specific issue, accessibility, and your location. All quotes from tradespeople on Tradesfolk are completely free.
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Ask a QuestionPlanning Permission Guidance
Some fixes for this problem may require planning permission or building regulations approval. Check if your project needs permission:
How to Prevent This
When fitting LED bulbs, use a trailing-edge dimmer designed for LEDs. Replace switches that feel stiff or loose.
Related Problems
Other Electrician Problems
Lights flicker, dim, or flash intermittently, sometimes across multiple rooms.
A circuit breaker in the consumer unit keeps tripping, cutting power to part or all of the house.
One or more plug sockets have no power, even though the rest of the room works fine.
A smell of burning plastic or scorching coming from a socket, sometimes with visible discolouration.