Socket Making A Buzzing Noise

A plug socket in your home is making a buzzing, crackling, or humming noise.

£60 – £150High Risk

What is this?

A buzzing or crackling noise from a plug socket is a warning sign that should not be ignored. Sockets carry mains voltage (230V) and high currents, and any abnormal noise usually indicates a problem with the internal contacts, the wiring connections, or the socket itself. Under BS 7671, all socket outlets must be securely connected with properly tightened terminals.

Common causes

Loose wiring connections at the back of the socket
Worn or damaged internal spring contacts not gripping the plug pins properly
Arcing due to a poor connection between the plug and socket
Overloaded socket drawing more current than it is designed for
Damaged or cracked socket allowing moisture ingress
Backstab (push-fit) connections loosening over time

Is it dangerous?

Yes, a buzzing socket is potentially dangerous. The buzzing often indicates electrical arcing, which generates extreme heat and is a leading cause of electrical fires in UK homes. If the socket also feels hot, has scorch marks, or smells of burning, stop using it immediately. Unplug everything from it and turn off the circuit at the consumer unit if possible.

Can I fix it myself?

No. Do not attempt to dismantle or repair a buzzing socket yourself unless you are a qualified electrician. You should unplug any appliances from the socket and avoid using it until it has been inspected. If you can identify the circuit at the consumer unit, switch it off. Check that the plug you were using is in good condition — a damaged plug can also cause buzzing.

When to call an electrician

Call an electrician promptly. A buzzing socket should be inspected within a day. If there is any burning smell, heat, scorch marks, or visible damage, treat it as an emergency and call immediately. Do not continue using the socket.

What will an electrician do?

Remove the socket faceplate to inspect the wiring connections

Check for signs of arcing, overheating, or damage to the terminals

Tighten or replace loose connections

Replace the socket outlet if the internal contacts are worn or damaged

Test the circuit to ensure the ring main is intact and properly connected

Check other sockets on the same circuit for similar issues

Typical cost

£60 – £150

Replacing a single socket and tightening connections is a quick, affordable job. If the wiring behind the socket is damaged, costs may be higher.

Find a Local Electrician

Need a qualified electrician? Browse all London electricians or find one in a borough near you.

Sources & References

Frequently Asked Questions

Is a buzzing socket dangerous?

Yes. A buzzing socket typically indicates arcing or a loose connection, both of which are fire risks. Stop using the socket, unplug everything from it, and call an electrician.

Can I still use other sockets on the same circuit?

Generally yes, as long as they are not also buzzing or showing signs of problems. However, if you can identify and turn off the affected circuit at the consumer unit, that is the safest approach.

Why does the socket only buzz when something is plugged in?

This usually means the internal spring contacts are worn and not gripping the plug pins tightly, causing arcing under load. The socket needs replacing.

Could it be the plug rather than the socket?

Possibly. A plug with loose internal connections or bent pins can cause buzzing. Try a different appliance in the same socket — if the buzzing continues, the socket is the problem.

How often should sockets be replaced?

There is no fixed lifespan, but sockets showing signs of wear — loose plug fit, discolouration, cracking, or buzzing — should be replaced. An EICR (Electrical Installation Condition Report) every 10 years for owner-occupied homes will identify worn sockets.

Need help with this?

Book an Electrician