Smell of Burning from Consumer Unit? First Step: Turn the Main Switch Off Immediately
Why a Burning Smell Is a Serious Warning
A burning smell coming from your consumer unit (fuse board) is never something to ignore.
In many cases, it indicates overheating components, loose connections or insulation damage.
Electrical faults can escalate quickly and may lead to fire if not addressed immediately.
If you notice a plastic burning smell, visible smoke, crackling sounds or heat from the board,
treat it as an urgent safety issue.
A qualified Electrician in London
would always advise immediate isolation of the supply before investigation.
First Step: Turn the Main Switch Off Immediately
The very first action you should take is to switch OFF the main switch on your consumer unit.
This cuts power to all circuits in the property and reduces the risk of fire spreading.
Do this before attempting anything else. Do not try to reset breakers.
Do not attempt to open the consumer unit cover. Safety comes first.
- Locate the main switch (usually marked clearly).
- Push it fully to the OFF position.
- Keep clear of the board if you notice heat or smoke.
Common Causes of a Burning Smell from a Fuse Board
Several electrical faults can produce a burning odour:
- Loose terminal connections causing overheating
- Overloaded circuits
- Faulty RCBO or MCB devices
- Damaged internal wiring insulation
- Water ingress inside the board
In rental properties, faults may be identified during routine
London Landlord EICR Certificates,
which help prevent these dangerous situations before they escalate.
What You Should NOT Do
When you smell burning from a consumer unit, avoid the following:
- Do not remove the front cover
- Do not touch internal components
- Do not ignore the smell hoping it will stop
- Do not attempt DIY repairs
Electrical fires can develop behind the enclosure where damage is not immediately visible.
When to Call an Emergency Electrician
After switching off the main supply, contact a qualified professional immediately.
If there is active smoke, sparking or signs of fire, treat it as an emergency.
You should contact London Emergency Electricians
if:
- The board feels hot to the touch
- You see smoke or scorch marks
- Power will not safely restore
- The smell persists after isolation
Fast professional intervention can prevent serious property damage.
How to Prevent Electrical Burning Smells in the Future
Preventative maintenance is key. Regular inspection ensures loose connections or deteriorating
components are identified early.
- Have your installation inspected every 10 years (homeowners)
- Landlords should test every 5 years
- Avoid overloading sockets and circuits
- Upgrade outdated fuse boards
Modern consumer units with RCBO protection and surge devices significantly reduce fire risk.
Final Safety Advice
If you ever notice a burning smell from your consumer unit, act immediately.
Turn off the main switch first — always. Then seek professional help.
Electrical safety should never be delayed. Quick action protects your property,
your family and your peace of mind.