Main information
What it could mean
A buzzing or clicking sound from the switchboard can indicate a worn component, a loose connection, or something about to fail.
Safety first
Don't handle the switchboard to locate the noise; just note whether it comes with heat or smell.
Next step
New or worsening noise from the switchboard is worth checking before it develops into a more serious fault.
Frequently asked questions
Is a mild, constant hum always a concern?
A very slight hum can be normal in some components; if it's new, growing, or changing tone, it's worth checking.
What's the difference between a hum and a clicking sound?
A hum usually indicates a vibrating component; clicking can indicate a connection opening and closing intermittently.
Should I cut the power if I hear noise from the switchboard?
If the noise comes with heat or smell, cutting the main supply is a reasonable step if you can do so safely.
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