Fault finding & repairs

Electrical Fault Finding & Repairs in North West London

Tripping switches, dead sockets, flickering lights — we track down the cause with proper test equipment instead of guesswork, then fix it so it stays fixed.

  • ★★★★★ 5.0 on Google · 30+ reviews
  • NAPIT registered
  • City & Guilds qualified
  • Fully insured
  • 24/7 · no call-out fee
Electrician testing a socket with a multifunction tester

Common faults we fix

  • RCD or main switch tripping and won’t reset
  • Sockets or a whole circuit with no power
  • Flickering or dimming lights
  • Buzzing, crackling or warm sockets and switches
  • Outside lights or garden sockets that have stopped working
  • Faults after building work, a leak or a power cut

How we find the fault

We start by asking what happened and when, then isolate circuits one at a time. Using insulation-resistance and continuity testers we can pinpoint a damaged cable, a failing appliance, moisture in a fitting or a loose connection — without pulling up floors on a hunch.

Once we’ve found it, we explain what’s wrong and give you a price for the repair before going ahead. Most faults are fixed on the first visit.

Quick checks you can do first

  • Unplug everything on the affected circuit and try resetting the RCD or breaker
  • Plug appliances back in one at a time — if it trips on one, that appliance is likely the culprit
  • Check for water near outdoor sockets, lights or under sinks
  • If it trips immediately with everything unplugged, leave it off and call us
“I requested that they come over to help replace a faulty fuse switch, and they sent someone over on the same day!”— Mohammed, Google review ★★★★★

Google reviews

Rated 5.0 by customers across London

EXCELLENT
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Based on 25 reviews
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HACKER KING
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The good work the team
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Idebeaut By Iman
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Outstanding Service & Expertise! I recently hired this electrical engineer and I am beyond impressed with the quality of work delivered. From the very beginning, they were punctual, professional, and extremely knowledgeable. Every task was completed with precision and great attention to detail, ensuring everything was fully safe and compliant. They took the time to explain what needed doing, answered all my questions clearly, and offered smart solutions that saved both time and cost. The final result was flawless, neat wiring, tidy workspace, and everything working perfectly. It’s rare to find someone who combines technical expertise with excellent customer service, but they exceeded my expectations on every level. I will definitely be recommending them to friends, family, and anyone who needs reliable electrical work. An easy 5 stars!
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Soroosh Keshtgar
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X Electricians done a full rewire to our new house, followed by certification, he is passionate and take pride in a clean job,extremely professional with an good eye to detail, highly satisfied customer and will use them for all of our electrical needs, Thank you for your hard work! Would recommend.
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Gajendra Thanki
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We called X Electricians to do the electrics in our new bathroom conversion, new switch and light install,they came on time, very efficient and professional, excellent quality will certainly use them for all our electrical needs in the future again, grateful to have found and used their services Thank you very much!!
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Amir
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Called xelectricians to come upgrade my plastic fuse box for a new metal one. The did the job quick and issued the ECIR the same day. Will definitely be using them again for other jobs. Good for landlords too.
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Sabia Pardeshi
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Came to do electric work at my House, friendly efficient and did a amazing job!!!
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Blue Skies
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A lovely young man and very apt in his profession. Really happy with his work.
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yasmin muse
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I needed a light put up in my dining room. He arrived on time(on same day I called), worked quickly and professionally, and completed the job to a very high standard. I was impressed by his attention to detail and efficiency. Even better, his pricing was very fair and reasonable. I highly recommend his services and will definitely call him again for any future work.
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Mohammed profile picture
Mohammed
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X electricians are a great, reliable electrical company. I requested that they come over to help replace a faulty fuse switch, and they sent someone over on the same day! They helped buy me a new switch, replace the old switch and checked to make sure that everything was working again. The efficient electrician who helped us was very polite and hardworking and helped resolve our issue. I could not recommend them enough if you need help with any electrical issues. 10/10 Would recommend!

See all our Google reviews

Fault finding questions

How much does fault finding cost?

£75 for the first hour, which covers most faults, then £55 per half hour. There’s no call-out fee and parts are priced before fitting.

Why does my RCD keep tripping?

The usual causes are a faulty appliance, water getting into a fitting, a damaged cable (often from drilling or fixings) or a neutral-earth fault. Testing tells us which.

Can you come out of hours?

Yes — we cover North West London 24/7. Emergency rates apply in the evening and at weekends.

What if the fault is in an appliance?

We’ll identify which one and tell you. We don’t repair appliances, but we’ll make sure your installation is safe.

Something not working?

Call or WhatsApp us and describe the problem — we’ll tell you what to check and when we can get there.

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