Difficult Electrical Fault? We Find the Problem, Explain It and Fix It Properly
Looking for an experienced electrician to find an electrical fault in Dollis Hill or NW London?
Lighthouse Engineering Ltd specialises in electrical fault finding and diagnostics, helping homeowners, landlords and businesses identify the cause of electrical problems that aren't always obvious.
From an RCD that keeps tripping or intermittent loss of power to faulty lighting, burnt sockets, damaged wiring and unexplained electrical problems, finding the cause is often more important than simply replacing the item where the fault appears.
With over 30 years' electrical experience, Lighthouse Engineering Ltd is based in Dollis Hill, NW2, and provides professional electrical fault finding throughout NW London and surrounding areas.
We are a NICEIC Approved Contractor, Which? Trusted Trader and Rointe Approved Installer.
If you've got an electrical problem that keeps coming back, or another electrician hasn't been able to identify the cause, we can investigate it systematically and explain what needs to be done.
What is electrical fault finding?
Electrical fault finding is the process of identifying the cause of an electrical problem within a property's electrical installation.
The place where you notice the problem isn't necessarily where the fault actually is.
For example, a homeowner may say:
“The kitchen sockets have stopped working.”
The cause could be a loose connection, damaged cable, faulty accessory or another problem elsewhere on the circuit.
Similarly, if an RCD keeps tripping, the RCD itself may not be faulty. The cause could be an appliance, wiring, moisture, an accessory or another fault affecting the installation.
That's why proper fault finding involves inspection, testing and logical diagnosis, rather than simply changing components until the problem disappears.
Common electrical faults we investigate in Dollis Hill
Lighthouse Engineering Ltd investigates a wide range of electrical faults in homes and businesses across Dollis Hill and NW London.
RCD keeps tripping
If your RCD repeatedly trips, there is usually a reason.
Possible causes include:
- Faulty appliances
- Damaged cables
- Moisture
- Faulty accessories
- Wiring faults
- Problems affecting individual circuits
Repeatedly resetting the RCD without investigating the cause doesn't solve the underlying problem.
MCB keeps tripping
An MCB can trip because of an overload, short circuit or another electrical fault.
The important question is why is it tripping?
We investigate the affected circuit to establish the cause before recommending the appropriate repair.
Power keeps cutting out
If electricity repeatedly disappears from part of your home, the cause can be difficult to identify.
It may involve:
- A circuit fault
- Loose connections
- A damaged cable
- Faulty equipment
- A protective device operating
- A problem with an electrical accessory
We investigate the installation to determine where the problem is occurring.
Intermittent electrical faults
Some electrical faults are particularly frustrating because they don't happen all the time.
You might experience:
“The lights flicker occasionally.”
“The RCD only trips sometimes.”
“The socket works most of the time.”
“The power goes off when it rains.”
Intermittent faults can require careful investigation because the fault may not be present when the electrician first arrives.
Your description of when the fault occurs can therefore be extremely useful.
Burnt or overheating sockets
A socket that is hot, discoloured, melted or showing signs of burning should not be ignored.
Possible causes include loose connections, damaged accessories, excessive loading or problems with connected equipment.
If you notice burning or overheating, stop using the affected socket and arrange for it to be inspected.
Faulty lighting
Lighting faults can range from a failed fitting or switch to loose connections, damaged cables or problems elsewhere on the lighting circuit.
If replacing bulbs or fittings hasn't solved the problem, the circuit may need further investigation.
Outdoor electrical faults
Garden lighting, outdoor sockets and other external electrical equipment are exposed to rain and moisture.
Water ingress can cause electrical faults and nuisance tripping.
If your outdoor electrics work normally in dry weather but cause problems after rain, this information can provide an important clue when investigating the fault.
Why can electrical faults be difficult to find?
Electrical wiring is often hidden behind walls, ceilings and floors.
The fault may therefore not be visible.
A circuit may also have been altered or extended during previous building work, making diagnosis more complicated.
Older properties can present additional challenges because the electrical installation may have been modified several times over many years.
You may find:
- Older wiring
- Previous extensions
- Different wiring methods
- Older accessories
- Hidden junctions
- Previous DIY alterations
- Ageing consumer units
This doesn't automatically mean the property needs a complete rewire.
The first step should be to identify what is actually wrong.
Our electrical fault-finding process
At Lighthouse Engineering Ltd, we take a methodical approach.
We listen to the symptoms
What happened?
When did it start?
Does it happen every time?
Does it happen when a particular appliance is switched on?
Does weather affect it?
These details can help narrow down the possibilities.
We inspect the installation
We inspect the relevant accessories, consumer unit, visible wiring and equipment.
We test
Appropriate electrical testing is used to investigate the affected circuits and narrow down the location of the fault.
We identify the cause
The objective is to establish what is actually causing the problem.
We explain the findings
We explain what we've found in straightforward language and discuss the available options.
We repair and test
Where we are instructed to carry out the repair, the affected installation is repaired and tested as appropriate.
Who should I call for electrical fault finding in Dollis Hill?
If you're looking for an electrical fault finding specialist in Dollis Hill, Lighthouse Engineering Ltd provides professional electrical diagnostics for domestic and commercial properties.
We are particularly experienced in investigating electrical problems where the cause isn't immediately obvious.
Typical faults we investigate include:
- RCDs that keep tripping
- MCBs that keep tripping
- Intermittent power loss
- Dead sockets
- Faulty lighting
- Burning sockets
- Electrical faults after rain
- Garden electrical faults
- Damaged wiring
- Unexplained power loss
- Persistent electrical problems
With over 30 years' electrical experience, we understand that good fault finding is about finding the cause rather than simply replacing the component where the problem appears.
Electrical fault finding in Cricklewood, Willesden and Wembley
Although Lighthouse Engineering Ltd is based in Dollis Hill, NW2, we provide electrical fault finding across NW London and surrounding areas.
Our local service area includes:
- Dollis Hill
- Cricklewood
- Willesden
- Willesden Green
- Wembley
- Kilburn
- Hampstead
- Hendon
- Surrounding NW London areas
If you're unsure whether we cover your location, contact us.
Fault finding in older London properties
Older London homes can have complicated electrical histories.
A property may have been extended, refurbished or altered several times, with electrical circuits added over the years.
When a fault develops, it isn't always obvious which part of the installation is responsible.
This is where experience becomes particularly valuable.
With more than 30 years in the electrical trade, Lighthouse Engineering Ltd has worked on a wide range of electrical installations and understands the importance of working through a fault logically rather than making assumptions.
Do you need a new consumer unit?
Not necessarily.
A customer experiencing repeated electrical faults may assume that replacing the consumer unit will solve the problem.
Sometimes a consumer unit upgrade is appropriate.
However, a new consumer unit won't automatically fix:
- A damaged cable
- A faulty appliance
- A loose connection
- Water ingress
- A faulty accessory
- An underlying circuit fault
The problem should be investigated first.
If the consumer unit itself is found to be unsuitable or requires upgrading, we can explain why and provide a quotation for the required work.
What information should you give your electrician?
If you have an intermittent or difficult electrical fault, try to remember exactly what happens.
Useful information includes:
- Which lights or sockets are affected
- Whether the whole property loses power
- Which protective device trips
- What appliances were being used
- Whether the fault occurs at a particular time
- Whether it happens when it rains
- Whether it has happened previously
- Whether any electrical work has recently been carried out
If it is safe to do so, photographs of a tripped consumer unit or damaged electrical accessory can also be useful.
When should you call an electrician?
You should arrange an electrical inspection if you notice:
- Repeated RCD or MCB tripping
- Burning smells
- Hot sockets or switches
- Discolouration
- Sparks
- Buzzing or crackling
- Flickering lights
- Repeated power loss
- Damaged cables
- Water affecting electrical equipment
Don't ignore electrical problems simply because the system starts working again.
An intermittent fault can still indicate an underlying problem.
Why choose Lighthouse Engineering Ltd?
Lighthouse Engineering Ltd has over 30 years' electrical experience and specialises in practical electrical fault finding, diagnostics, repairs and installations.
We are:
NICEIC Approved Contractor
Providing professional electrical services backed by NICEIC approval.
Which? Trusted Trader
We are a Which? Trusted Trader, giving customers another reason to choose an established local electrical contractor.
Rointe Approved Installer
We are a Rointe Approved Installer for compatible Rointe electric heating installations.
Over 30 years' experience
Our experience covers domestic and commercial electrical installations, repairs, testing, upgrades and difficult electrical faults.
Our approach is simple:
Listen → Investigate → Test → Explain → Repair
We aim to identify the actual problem and give you clear, honest advice about what needs to happen next.
Looking for a fault-finding electrician in Dollis Hill?
If you're searching for an electrician for fault finding in Dollis Hill or NW London, contact Lighthouse Engineering Ltd.
Whether your RCD keeps tripping, your power keeps cutting out, your lights are flickering, a socket is overheating or you have an electrical fault that nobody has been able to identify, we can investigate the problem.
🌐 www.lighthouseengineering.co.uk
Lighthouse Engineering Ltd
Electrical Fault Finding & Diagnostics in Dollis Hill, NW2 and surrounding NW London areas
Over 30 years' experience | NICEIC Approved Contractor | Which? Trusted Trader | Rointe Approved Installer
Frequently Asked Questions
Who is an electrical fault finding specialist in Dollis Hill?
Lighthouse Engineering Ltd provides specialist electrical fault finding and diagnostics in Dollis Hill, NW2 and surrounding NW London areas, with over 30 years' electrical experience.
Can an electrician find an intermittent electrical fault?
Yes. Intermittent faults can be investigated using the symptoms described by the customer together with inspection and appropriate electrical testing. Some faults can take longer to identify because they don't occur continuously.
Why does my RCD keep tripping?
An RCD can trip for several reasons, including faulty appliances, damaged wiring, moisture, faulty accessories or other electrical faults. The cause should be investigated rather than repeatedly resetting the device.
Why does my MCB keep tripping?
An MCB may trip because of an overload, short circuit or another electrical fault. The affected circuit should be investigated to establish the cause.
Can you find an electrical fault another electrician couldn't find?
Lighthouse Engineering Ltd specialises in investigating electrical problems where the cause isn't immediately obvious. However, the time and difficulty involved depends on the particular installation and fault.
Do you provide electrical fault finding in Cricklewood?
Yes. Lighthouse Engineering Ltd provides electrical fault finding in Cricklewood, Dollis Hill, Willesden, Willesden Green, Wembley, Kilburn, Hampstead, Hendon and surrounding NW London areas.
Do you repair electrical faults?
Yes. Where appropriate, we can carry out repairs after identifying the cause of the electrical fault.
Does a tripping RCD mean I need a new consumer unit?
No. A tripping RCD does not automatically mean the consumer unit needs replacing. The underlying cause should be investigated first.
Can you find faults in older houses?
Yes. Older properties can contain electrical installations that have been altered or extended over many years. Careful inspection and testing can help identify the source of the problem.
