Expert Electrical
Fault Finding in Surrey

Professional Test Equipment

Same-Day Diagnosis

Fixed Repair Quotes

Fully Insured

NAPIT Registered

Electrical faults are frustrating, disruptive, and potentially dangerous. Whether it's a circuit that keeps tripping, lights flickering for no apparent reason, or sockets that have stopped working, you need the problem accurately diagnosed and permanently fixed.

At LJK Electrical, we use professional testing equipment and systematic diagnostic techniques to identify the root cause of electrical faults — not just the symptoms. There's no guesswork involved.

Once the fault is identified, we explain the issue clearly in plain English and provide a fixed quote for the repair. You know exactly what's wrong, why it happened, and what it will cost to fix before we start any work.

We serve homeowners across Surrey who are tired of intermittent problems, unexplained trips, and the uncertainty that comes with undiagnosed electrical faults.

Why Electrical Faults Get Worse Over Time

Intermittent electrical faults rarely fix themselves. A circuit that trips occasionally will trip more frequently as the underlying fault deteriorates. What starts as a minor inconvenience can escalate into a complete circuit failure — or worse, a fire.

Ignoring a burning smell, a warm faceplate, or a buzzing socket is dangerous. These symptoms often indicate a loose connection, which generates heat through arcing. Arc faults are a leading cause of electrical fires in UK homes.

Repeatedly resetting a tripping RCD or MCB without investigating the cause is one of the most common mistakes homeowners make. The device is tripping because it's detected a dangerous fault — overriding it doesn't fix the problem, it removes your protection.

DIY fault finding — using the 'switch things on and off until it works' method — wastes time and can make the problem harder to diagnose. Professional diagnostic testing identifies the exact fault location and type in a fraction of the time.

You describe what's happening. We ask targeted questions to narrow down the likely fault type and location before arriving.

We inspect the consumer unit, affected circuits, accessories, and cable routes for visible signs of damage, overheating, or poor installation.

Using calibrated multi-function testers, we perform insulation resistance tests, continuity checks, earth loop impedance measurements, and RCD trip testing to isolate the fault.

We pinpoint the exact fault — whether it's degraded insulation, a faulty appliance, moisture ingress, a loose termination, or a wiring error.

You receive a clear explanation and a fixed quote for the repair. Most faults are repaired on the same visit.

Tripping RCD — The most common call we receive. RCD trips are caused by earth leakage, which can originate from a faulty appliance, damaged cable insulation, moisture in a junction box, or a wiring fault. We use a process of elimination combined with insulation resistance testing to identify the exact circuit and component at fault.

Tripping MCB — If a specific circuit breaker trips repeatedly, the issue is typically an overcurrent (too many appliances on one circuit), a short circuit in the cable or accessory, or a faulty MCB itself. We test the circuit under load and verify the MCB's trip characteristics.

Dead Sockets or Circuits — A socket or group of sockets that has stopped working may indicate a broken conductor, a disconnected terminal in a junction box, or a failed connection at the consumer unit. We trace the circuit using continuity testing to find the break.

Flickering or Dimming Lights — This can be caused by a loose neutral connection, a failing light switch, voltage fluctuations, or a problem at the supply point. We test voltage stability, connection integrity, and switch operation to identify the source.

Burning Smell or Warm Faceplates — A burning smell near sockets, switches, or the consumer unit indicates overheating, usually from a loose connection or overloaded circuit. This requires immediate investigation as it's a fire risk.

Intermittent Faults — The hardest faults to diagnose are those that come and go. We use systematic testing and, where necessary, monitoring equipment to catch faults that only occur under specific conditions (temperature, load, vibration).

We use Megger and Metrel multi-function testers, clamp meters, voltage testers, and thermal imaging cameras where required. All instruments are calibrated annually.

What types of faults do you deal with?

Tripping circuits, power loss, flickering lights, dead sockets, burning smells, humming or buzzing noises, intermittent faults, and any other unusual electrical behaviour in your home.

How long does fault finding take?

Most electrical faults are diagnosed within 1–2 hours. More complex or intermittent faults may take longer, but we'll keep you informed throughout the process.

How much does fault finding cost?

We charge a fixed diagnostic fee, which is then deducted from the repair cost if you proceed with the work. You'll always know the total cost before any repair begins.

Do you fix the fault on the same visit?

In most cases, yes. If the repair is straightforward and we have the parts, we'll fix it there and then. For more complex work, we'll provide a separate fixed quote.

My RCD keeps tripping — what should I do?

Don't keep resetting it without investigation. The RCD is detecting a dangerous fault. Call us and we'll diagnose the cause — it's usually a faulty appliance, moisture, or degraded wiring.

Can you find faults that other electricians couldn't?

We follow a systematic diagnostic process using professional testing equipment. Intermittent and complex faults are our speciality — we don't leave until the root cause is identified.

Is fault finding covered by a guarantee?

Yes. All repair work is guaranteed. If the same fault recurs within our guarantee period, we return and fix it at no extra cost.

Do I need to be home during fault finding?

Yes, it's helpful to have someone present who can describe the symptoms and provide access to all areas of the property.