Main information
What it could mean
Sparks at a light switch usually indicate wear in the internal mechanism or a connection that's no longer making good contact.
Safety first
Avoid using that switch while it's checked; use another light point in the room if possible.
Next step
A switch that sparks usually needs replacing; worth checking before the wear gets worse.
Frequently asked questions
Why does a switch start sparking over time?
The internal mechanism wears with use and stops making clean contact, creating small electrical arcs.
Is it urgent to replace a switch that sparks?
Worth addressing soon, though not always an immediate emergency if the sparks are minimal and occasional.
Could it affect the connected bulb or fitting?
Uncommon, but a sustained poor contact can shorten the bulb's life.
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