What is this?
A socket that is hot to the touch is overheating. A slight warmth when a high-draw appliance is plugged in (such as a heater or kettle) can be normal, but a socket that is noticeably hot — especially when lightly loaded or with nothing plugged in — indicates a fault. The heat is generated by electrical resistance at a poor connection, and it can escalate quickly.
Common causes
- Loose terminal connections at the back of the socket creating resistance
- Damaged or corroded contacts inside the socket
- Overloaded socket drawing excessive current
- Backstab connections that have worked loose
- Faulty wiring in the back box — nicked or compressed cables
- Using a single socket for a high-draw appliance via an adaptor
Is it dangerous?
Yes. A hot socket is a sign of excessive resistance and potential arcing. If left unchecked, the heat can melt the socket plastic, damage the wiring insulation, and cause a fire. Even if the socket appears to work normally, heat means there is a problem. If the socket is hot with nothing plugged in, the fault is in the fixed wiring and needs urgent attention.
Can I fix it myself?
No. Stop using the hot socket immediately. Unplug any appliances from it and avoid inserting plugs into it. If the socket is very hot, turn off the circuit at the consumer unit. Do not attempt to open the socket yourself. Note whether the socket is hot when loaded (something plugged in) or hot with nothing plugged in — this is useful information for the electrician.
When to call an electrician
Call an electrician within 24 hours if the socket is hot when loaded. If it is hot with nothing plugged in, or if you notice any burning smell or discolouration, call an emergency electrician immediately. A hot socket should never be left uninvestigated.
What will an electrician do?
Remove the socket faceplate and inspect all terminal connections
Check for signs of overheating — discoloured insulation, melted plastic, charred terminals
Tighten all connections to the correct torque specification
Replace the socket if the internal contacts or housing are damaged
Test the ring circuit to ensure it is intact and properly connected
Check if the circuit is overloaded and advise on additional sockets or circuits if needed
Typical cost
£60 – £180
Socket replacement with connection inspection is a standard job. Costs increase if the back box or wiring needs replacing due to heat damage.
