How To Replace A Moulded Plug On A Vacuum Cleaner
If the moulded plug on your vacuum cleaner becomes damaged, you usually do not need to replace the entire power cable.
In many cases, replacing the plug itself is a quick and simple repair that can be done at home using basic tools.
This guide will walk you through the process step by step, even if you have never wired a plug before.
Video guide available at the bottom of this page.
What You Need Before You Start
Always work safely and unplug the vacuum cleaner from the mains before carrying out any repair.
For this repair, you only need a few simple tools:
- Scissors or wire cutters
- Screwdriver (flat or Phillips depending on the plug)
- A standard 13 amp replacement plug
Replacement plugs are widely available from hardware stores and supermarkets.
How To Replace A Moulded Plug Step By Step
-
Cut Off The Old Plug
Using scissors or cutters, remove the damaged moulded plug by cutting the cable a few inches below the plug itself. This is especially important if the cable has become intermittent near the plug. -
Separate The Wires
Carefully split the brown and blue wires apart for roughly 4cm. Some vacuum cleaners may also include a green/yellow earth wire. -
Strip The Outer Insulation
Gently remove the outer insulation to expose the inner wires. If you accidentally damage the copper strands, cut back and start again until you have clean wire exposed. -
Prepare The Replacement Plug
Unscrew the middle screw on the replacement plug and remove the back cover. Loosen the cable grip screws ready for fitting the cable. -
Identify The Wire Positions
The wiring positions are:- Brown wire = Live terminal (L) on the right
- Blue wire = Neutral terminal (N) on the left
- Green/yellow wire = Earth terminal at the top (if fitted)
-
Strip The Wire Ends
Strip approximately 6mm of insulation from each wire end and twist the copper strands neatly together. -
Connect The Wires
Insert each wire fully into the correct terminal and tighten the screws securely. Make sure no bare copper wire is visible outside the terminals. -
Secure The Cable Grip
Position the cable grip over the black outer insulation and tighten both screws firmly. This stops the cable being pulled out accidentally. -
Reassemble The Plug
Refit the plug cover and tighten the middle screw. Double check all connections before plugging the vacuum back in.
Common Wiring Colours Explained
- Brown = Live (L)
- Blue = Neutral (N)
- Green/Yellow = Earth (E)
Most modern double-insulated vacuum cleaners only use brown and blue wires.
Important Safety Tips
- Always unplug the appliance before starting
- Never leave exposed copper visible outside terminals
- Ensure the cable grip clamps the outer insulation, not the inner wires
- Use the correct fuse rating for the appliance
- Do not rush the repair
What Fuse Should A Vacuum Cleaner Plug Use?
Most vacuum cleaners use a 13 amp fuse, although you should always check the rating for your specific appliance.
Many replacement plugs already include a fuse fitted inside.
Frequently Asked Questions
Can you replace a moulded plug yourself?
Yes. Replacing a moulded plug is a fairly simple DIY repair when carried out carefully and safely.
What if my vacuum cleaner has an earth wire?
The green/yellow earth wire connects to the top earth terminal in the plug.
Why does my vacuum cleaner plug get hot?
A loose connection, damaged cable or failing plug can sometimes cause overheating.
Do modern vacuum cleaners need an earth wire?
Many modern double-insulated vacuums only use live and neutral wires, but always follow the wiring information for your appliance.
Can a damaged plug cause intermittent power?
Yes. Damaged plugs and cables are a common cause of vacuums cutting in and out.
Why Learn To Replace A Vacuum Cleaner Plug?
- Saves money on repairs
- Prevents unnecessary waste
- Extends the life of your vacuum cleaner
- Builds useful DIY repair skills
Watch The Full Step By Step Video
The video below shows the full process of replacing a moulded vacuum cleaner plug safely.