Replace a plug fuse
Save £30–60 today
5 mins · Beginner · Saves £30–60 vs an electrician
Last updated: March 2025
Before you start
UK plugs contain a small fuse inside them. When an appliance suddenly stops working, the plug fuse is the first thing to check — it costs £1 and takes 2 minutes.
This fix works for any standard UK 3-pin plug. If the appliance trips the whole circuit rather than just going dead, see our circuit breaker guide instead.
Tools needed
- ✓Flat-head screwdriver — to open the plug
- !Replacement fuse — buy: buy: £1–3 — must match the existing rating (3A or 13A stamped on the side)
Unplug from the wall
Never work on a plugged-in appliance. Pull it out of the socket first.
Where beginners go wrong
Fitting a higher-rated fuse to stop it blowing — a 13A fuse in a lamp is a fire risk. Always match the rating.
Not investigating why it blew — if the new fuse blows immediately, the appliance is faulty. Stop using it.
Opening a plug that is still in the socket — always unplug first.
Stop and call a electrician if...
The new fuse blows immediately — the appliance is faulty; stop using it and get it repaired or replaced
There are scorch marks inside the plug or on the cable
The cable is damaged or the wires are exposed
Cost breakdown
What you just learned
You now know how UK plug fuses work, how to match fuse ratings to appliances, and how to diagnose a blown fuse. This applies to every plug-top appliance in your home.
✅ Completed by 9,241 people
⚠️ Watch out if you rent
Replacing a plug fuse is basic maintenance any tenant can do. If the appliance is one your landlord provided and it keeps blowing fuses, report it — a faulty appliance is their responsibility to replace.