Electrical Fault Finding in London
If your electrics keep tripping, you have lost power, lights are flickering or you can smell burning from electrical equipment, professional fault finding is essential.
BuildSpark provides electrical fault finding services throughout South West London, helping homeowners, landlords, HMOs and businesses identify electrical faults quickly and safely.
Our electricians use professional testing equipment to diagnose faults accurately and provide safe, cost-effective repair solutions.
Electrical Faults We Fix Every Day
Electrical faults are often urgent and should never be ignored.
Common Electrical Faults We Diagnose
Electrical faults can develop gradually or occur without warning. Many faults can create serious safety risks if left unresolved.
Common faults we investigate include:
• Faulty sockets
• Electric shocks from accessories
• Overloaded circuits
• Water-damaged electrical systems
• Intermittent faults
Fuse Board Keeps Tripping
One of the most common callouts we receive is for consumer units that repeatedly trip.
This may be caused by:
• Faulty appliances
• Damaged wiring
• Moisture ingress
• Circuit overloads
• Faulty RCBOs
• Faulty RCDs
• Hidden electrical faults
Our electricians can isolate the affected circuit and identify the cause of the problem.
No Power in Part of the Property
If part of your home or business has lost power, there may be a fault affecting a specific circuit.
Common examples include:
• No sockets working
• No lighting
• Cooker circuit failure
• Shower circuit failure
• Heating controls not working
• Partial power loss
We use specialist testing equipment to locate the fault and restore power safely.
Burning Smells, Sparks & Overheating
A burning smell from sockets, switches, consumer units or appliances should never be ignored.
Potential causes include:
• Loose connections
• Overheating cables
• Damaged accessories
• Arcing faults
• Overloaded circuits
If you notice burning smells, sparks or unusual noises, isolate power if safe to do so and contact an electrician immediately.
Electrical Fault Finding for Failed EICRs
Many unsatisfactory EICR reports contain observations that require further investigation and fault diagnosis.
We regularly carry out fault finding following:
• Tripping circuits
• Missing RCD protection
• Earthing and bonding issues
• Damaged wiring
Once faults are identified, we can complete the remedial works required to restore compliance.
Electrical Fault Finding for Landlords & HMOs
BuildSpark works with landlords, letting agents and HMO operators throughout London.
We investigate electrical faults between tenancies, following failed inspections and during emergency callouts.
Our fault finding service can help minimise downtime and maintain compliance requirements.
How We Diagnose Electrical Faults
We use professional electrical testing equipment to identify faults accurately.
Our process includes:
• Visual inspection
• Circuit testing
• Insulation resistance testing
• Continuity testing
• Earth fault testing
• RCD testing
• Appliance isolation
• Circuit tracing
Once the fault has been identified, we explain the issue and provide repair options.
Why Choose BuildSpark
• NAPIT Registered Electrician
• City & Guilds Qualified
• Fully Insured
• Fast Response Times
• Emergency Callouts Available
• Transparent Pricing
• 12-Month Workmanship Warranty
• Domestic, Commercial & HMO Experience
How We Find Electrical Faults
We use professional diagnostic tools to:
Isolate Faulty Circuits
We test each circuit individually to identify the issue.
Detect Wiring Failures
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- We locate damaged or unsafe wiring inside walls and systems.
Identify Overloads
We test electrical load distribution across circuits.
Check Consumer Units
We inspect fuse boards for faults or failure risks.
Emergency Electrical Fault Finding
If your issue involves danger or power loss, we prioritise urgent callouts.
You Need Emergency Help If You Have:
- burning smells
- no power in home
- repeated tripping
- exposed wiring
- sparks or smoke
Areas We Cover
- Tooting
- Wandsworth
- Balham
- Clapham
- Wimbledon
- Battersea
- Earlsfield
- South West London
Frequently Asked Questions?
How quickly can you attend?
We aim for fast response across South West London, especially for urgent cases.
Why do my electrics keep tripping?
Electrics usually trip because the electrical system has detected a fault and automatically disconnected the power to prevent electric shock, overheating or fire. Common causes include faulty appliances, damaged wiring, overloaded circuits, moisture ingress or faults within the consumer unit. Professional fault finding is often required to identify the exact cause.
Can a faulty appliance trip my fuse board?
Yes. Faulty appliances are one of the most common causes of tripping electrics. Kettles, washing machines, ovens, immersion heaters, electric showers and extension leads can develop faults that cause RCDs or circuit breakers to trip. We can help identify whether the fault is with the appliance or the electrical installation.
Is a tripping RCD dangerous?
A tripping RCD is usually a sign that it is working correctly by detecting a fault and disconnecting the power. However, repeated or unexplained tripping should never be ignored, as it may indicate damaged wiring, faulty equipment, water ingress or an electrical safety issue that requires investigation.
How much does electrical fault finding cost?
BuildSpark charges £70 per hour between 08:00 and 18:00 and £100 per hour between 18:00 and 08:00, with a minimum charge of one hour. Most faults can be diagnosed during the initial visit, although more complex faults may require additional investigation. Any repair costs will be discussed before work proceeds.
Do you provide emergency fault finding?
Yes. BuildSpark provides emergency electrical fault finding throughout South West London for issues such as complete power loss, burning smells, tripping electrics, exposed wiring, faulty consumer units and other urgent electrical problems.
Do you work on landlord and HMO properties?
Yes. We work with landlords, letting agents, property managers and HMO operators throughout London. Our services include electrical fault finding, EICR certificates, remedial works, fuse board upgrades, smoke alarm installations, emergency lighting and ongoing electrical maintenance.
Can you diagnose faults found during an EICR?
Yes. We regularly investigate faults identified during Electrical Installation Condition Reports (EICRs), including C1, C2 and FI observations. Once the issue has been diagnosed, we can provide remedial works to help restore compliance and electrical safety.
Is a tripping fuse box dangerous?
Yes. Repeated tripping may indicate an underlying electrical fault that could become hazardous.
What causes partial power loss?
Partial power loss is often caused by circuit failure, damaged wiring, or faulty connections.
What should I do if I smell burning?
Turn off the affected circuit immediately and avoid using it until it has been inspected.
How do electricians find faults?
We use electrical testing equipment to isolate circuits and locate the source of the issue safely.
Can faults be repaired on the same visit?
Often yes, depending on the issue and required parts.
Electrical Problems? Don’t Wait.
Electrical faults can escalate quickly. If you are experiencing issues, get them diagnosed and repaired as soon as possible.
Can electrical faults cause fires?
Yes. Faulty wiring, loose connections, overloaded circuits, damaged accessories and electrical arcing can all increase the risk of fire. Warning signs may include burning smells, buzzing sounds, flickering lights, discoloured sockets or repeated tripping. If you suspect an electrical fault, it should be inspected as soon as possible.
What should I do if I smell burning from a socket?
If it is safe to do so, switch off the affected circuit or isolate the power at the consumer unit. Stop using the socket immediately and avoid plugging in any appliances. A burning smell can indicate overheating, loose connections or damaged wiring and should be inspected by a qualified electrician without delay.
Can faults be repaired during the same visit?
In many cases, yes. Once the fault has been identified, we can often carry out repairs during the same visit, subject to the nature of the fault and the availability of any specialist parts or materials required.