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uk Home & property emergencies discoloured socket • warped socket faceplate • melted plug • plug feels hot • socket feels warm • smell of hot plastic • burning smell near socket • scorch marks on outlet • electrical overheating at socket • outlet buzzing crackling • arcing at socket • plug getting warm • extension lead overload • adaptor overload • worried about electrical fire • outlet looks burnt • socket cover discoloured • plug top overheating

What to do if…
you find an outlet or plug faceplate is discoloured or warped and you suspect overheating

Short answer

Stop using that socket/plug immediately. If it’s safe, switch off power to that circuit at your consumer unit (or the main switch) and arrange a registered electrician to check it.

Do not do these things

  • Don’t keep using “just this once” to charge something or run an appliance from that outlet.
  • Don’t touch the faceplate, plug pins, or cable if anything feels hot, soft, sticky, or looks melted.
  • Don’t remove the socket/front plate or try to tighten wiring yourself.
  • Don’t ignore a hot-plastic/burning smell, buzzing/crackling, smoke, or repeated tripping/fuse blowing.
  • Don’t move the plug by yanking the cable (it can worsen a loose connection).
  • Don’t swap in higher-rated fuses, or “solve” it by using an adaptor/extension lead elsewhere without checking the cause.

What to do now

  1. Make a safer pause. If you see smoke/flames or hear sustained crackling/arcing, get everyone out and call 999. Close doors behind you if you can.
  2. Stop the load immediately (only if it’s safe). If you can approach safely and nothing is hot or melting, switch the socket off (if it has a switch) and unplug the appliance by holding the plug body (not the cable).
    • If the plug/faceplate is hot, softened, stuck, or you smell burning: do not touch it—go to step 3.
  3. Turn off power to that circuit (only if safe to go to the consumer unit). Switch off the relevant MCB. If you’re unsure which one, you can switch off the main switch.
    • If the consumer unit area feels hot, smells of burning, is smoking, or crackling: don’t open it or stand close—leave and call 999.
  4. Reduce fire risk while you wait. Keep anything flammable (paper, curtains, aerosols) away from the outlet and the plugged-in appliance.
    • If there’s odor but no smoke/flames, ventilate the room briefly if you can do so quickly and safely.
  5. Mark it as “do not use.” Put tape/a note over the socket and tell others in the property not to use it. Keep the appliance that was plugged in out of use too.
  6. Get the right help.
    • If you rent: contact your landlord/letting agent and report it as an urgent electrical safety issue.
    • If you own: contact a registered electrician and describe: discoloration/warping, any smell, heat, buzzing, sparks, and what was connected.
  7. If power keeps tripping or anything else nearby seems affected (flickering lights, buzzing, warmth elsewhere): leave that circuit (or the main switch) off and treat it as urgent until checked.

What can wait

  • You don’t need to decide why it happened right now (overload, loose connection, damaged accessory, faulty appliance).
  • You don’t need to replace the socket/plug yourself today.
  • You don’t need to test it by plugging something else in “to see if it’s OK.”

Important reassurance

Discolouration or warping is a reasonable reason to act quickly—many electrical fires are prevented simply by stopping use and isolating power early. You’re not overreacting by treating this as a safety issue.

Scope note

These are first steps only, to stabilise the situation and avoid making it worse. An electrician may need to inspect the socket, wiring, and the appliance/plug that was connected.

Important note

This guide is general information, not a substitute for an on-site electrical assessment. If you see smoke/flames or feel you’re in immediate danger, leave and call emergency services.

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