Enter your postcode — we'll reply on WhatsApp with the nearest available engineer.
Same-day visits available · No obligation
Fault Finding &
Diagnostics.
Root cause found, first visit.
Intermittent trips, unexplained power loss, flickering lights, RCDs that won't stay reset — our engineers use proper test equipment to find the actual fault, not guess and reset.
Enter your postcode — we'll reply on WhatsApp with the nearest available engineer.
Same-day visits available · No obligation
87% of call-outs attended within this time
Fixed call-out fee + Hourly rate. No hidden costs.
All repairs and installations fully backed
Every day of the year including bank holidays
What kind of faults do we diagnose?
If something feels wrong with your electrics, don't ignore it. These are the most common faults we find and fix.
RCD or breaker that keeps tripping
An RCD that trips repeatedly has a leakage fault somewhere on the circuit. We isolate each circuit in turn to find exactly what's drawing the trip — then fix it.
Call us now →Intermittent faults & flickering lights
Faults that come and go are the hardest to find without proper equipment. We use insulation resistance testing and thermal methods to catch problems other engineers miss.
Call us now →Dead circuits or partial power loss
A circuit that's gone dead without a tripped breaker points to a wiring break or connection failure. We trace it end to end with continuity testing.
Call us now →Burning smell or warm sockets
Heat from a socket, switch, or fuse board indicates a high-resistance connection or overload. This is a fire risk — we make it safe first, then diagnose.
Call us now →Burning smell or visible scorch marks? Switch off at the consumer unit and call us immediately. Don't wait to see if it goes away.
We find the actual fault —
not just reset and hope
Most electrical problems have a root cause that a simple reset won't fix. Tripped RCDs that keep coming back, flickering lights that come and go, dead circuits with no obvious reason — these need systematic testing with proper instruments. We trace the fault to its source and repair it properly the first time.
Systematic, not guesswork
We test methodically — insulation resistance, continuity, loop impedance, RCD operation — until we have a clear picture of what's wrong and where.
Diagnosed and repaired same visit
Our fully stocked vans carry the parts for the most common faults. Once the cause is found, we quote and fix in the same visit wherever possible.
Clear cost before we start
Diagnostic visit fee covers the test and quote. You know the repair price before we touch anything. No surprises on the invoice.
Why call Bright Sparks
for fault finding?
Any electrician can reset a tripped switch. We find out why it tripped — and make sure it doesn't happen again.
Proper test equipment — not just a screwdriver
We carry Megger insulation testers, loop impedance testers, RCD testers, and thermal detection. The right instruments find faults that a visual check alone will miss.
City & Guilds qualified — not just registered
Every engineer holds City & Guilds 2391 diagnostic qualifications. We understand how circuits behave under fault conditions — and what the test results actually mean.
Transparent pricing — quote before we start
Diagnostic visit fee is fixed. Any repair work is quoted clearly before we begin. No surprise charges, no inflated labour rates, no invoice shock.
Same-day and next-day visits across Sussex
We offer same-day diagnostics for urgent faults and next-day scheduling for non-urgent issues. If it needs to be sorted now, we will come now.
How we find the fault —
step by step
Methodical, transparent, and resolved properly the first time.
Visual inspection first
We start with a thorough visual check of the consumer unit, accessible wiring, sockets, and switches — looking for signs of overheating, loose connections, or poor previous work.
Systematic electrical testing
Using calibrated test instruments we measure insulation resistance, earth continuity, loop impedance, and RCD operation times. This pinpoints the fault circuit and location.
Fault isolated and confirmed
We identify the exact location — whether it's a connection, a section of cable, a faulty accessory, or a deteriorating appliance drawing a trip. You'll know exactly what we found.
Clear quote — then repair
We explain what we found in plain English and give you a fixed price. Once approved, the repair is completed the same visit wherever possible, with Part P certification where required.
What our customers say
Fault finding services
we cover across Sussex
If something's wrong with your electrics and you can't work out why — that's exactly what we do.
RCD Trip Investigation
Persistent RCD trips are traced to the exact circuit and fault location using insulation resistance and leakage current testing.
Flickering & Intermittent Faults
Lights that flicker, circuits that come and go — we use thermal and resistance testing to catch loose connections and failing cables.
Dead Circuits & No Power
A circuit with no power and no tripped breaker has a break or failed connection somewhere. We trace it to the exact point.
Consumer Unit Faults
Worn MCBs, failed RCDs, corroded terminals — the consumer unit is central to your whole installation and we test every component.
Insulation Resistance Testing
Degraded cable insulation causes leakage faults that are nearly impossible to find visually. Our Megger testers reveal them quickly.
Partial Power Loss
Power lost to one room or one ring main? We identify whether it's a supply issue, a wiring fault, or a failed accessory and repair it same visit.
What to expect from a fault finding
and diagnostics visit
What fault finding actually involves
Fault finding is the process of systematically testing an electrical installation to identify why it's behaving incorrectly. This involves measuring insulation resistance to find cable degradation, testing earth continuity to confirm safe paths to earth, checking RCD and MCB operation times, and tracing circuits section by section until the fault is isolated. It requires the right instruments and the expertise to interpret the results correctly.
Why some faults are difficult to find
Intermittent faults — those that only appear sometimes — are the hardest category. They can be caused by a loose connection that only fails under load or heat, a cable that's been partially damaged and breaks contact when moved, or an appliance with a fault that only manifests at certain voltages. We use thermal imaging and resistance measurement under load conditions to catch faults that only appear intermittently.
Older properties and wiring faults in Sussex
A large proportion of Sussex properties contain wiring that has been extended, altered, or repaired over decades — sometimes without certification. PVC cables from the 1970s, rubber-insulated wiring from pre-war properties, and DIY work that bypassed the original circuit design are all common. Our engineers have extensive experience with older installations and know what to look for.
When fault finding reveals larger problems
Sometimes a diagnostic visit reveals that the wiring installation needs more than a single repair — degraded insulation throughout, an overloaded consumer unit, or circuits that don't meet current regulations. We always explain what we find clearly and give you the options. There is never any pressure to proceed with work beyond what you've asked for.
Part P certification after diagnostic repairs
Any notifiable electrical work carried out as a result of fault finding — including circuit repairs, consumer unit work, and rewires — is certified under Part P building regulations. As a Part P Approved contractor, we self-certify and register all notifiable work, giving you the correct certificate without involving a third party or additional fee.
Need a fault finding electrician in Sussex?
Call us directly — you'll speak to a real engineer who will book a diagnostic visit at the earliest available time.
07950 692798Fault finding electricians
across all of Sussex
We cover towns, villages, and rural properties across East and West Sussex. Not sure if we reach you? Call or WhatsApp — we'll tell you straight away.
Areas We Cover
Don't see your town? We cover many smaller villages and rural areas across Sussex too.
Check Your AreaFault finding electricians in East Sussex
Victorian terraces in Hastings, Georgian townhouses in Lewes, older semis across Eastbourne and Bexhill — these properties often have decades of alterations behind their walls. Our engineers understand older wiring systems and carry the test equipment needed to diagnose them accurately.
Fault finding electricians in West Sussex
Worthing, Shoreham, Lancing, and the towns and villages north toward Horsham and Crawley. Whether you're in a 1930s semi or a newer build with a modern consumer unit, our diagnostic service covers all of West Sussex.
Common questions about fault finding
and electrical diagnostics
Real people behind the service
When you call, you're speaking to someone who genuinely cares — day or night.
Aaron
Managing Director
Ben
Service Manager
Jack
Service Coordinator
Sam
Marketing
Lizzy
Customer Service
Electrical fault in Sussex?
Let's find it.
Call us now and we'll book a diagnostic visit — same day where possible. Root cause found, properly fixed.
07950 692798 — Tap to CallSame-day visits available · Part P Approved · City & Guilds Qualified