Electrical Fault Finding York
Electrical fault finding in York
Tripping RCDs, unexplained power loss, circuits that trip immediately on reset, burning smells, intermittent failures. Found properly with calibrated test equipment, not guesswork. Most faults diagnosed on the first visit.
What I can find and fix
Trips immediately on reset, trips randomly, or trips only when specific appliances are on. Diagnosed by circuit isolation and insulation resistance testing.
All circuits off and won’t reset. Could be the consumer unit, the meter tails, the supply fuse, or an active fault holding the RCD down. Diagnosed and made safe on the day.
Some circuits working, others not. Could be a failed MCB, a tripped RCD section, a broken neutral, or a failed connection at the consumer unit. Most are straightforward once the fault is isolated.
Treated as a priority. A burning smell from a socket indicates arcing at a loose connection, overloading, or insulation breakdown. Stop using the socket and call immediately. See the emergency page if urgent.
Faults that come and go are the most time-consuming to find but have a physical cause. Insulation resistance testing, connection checking, and environmental analysis. Most yield to methodical testing.
One room or circuit dead with no obvious trip at the board. Often a failed connection in a junction box or previous DIY work. Usually found within an hour.
How fault finding actually works
The difference between a proper fault diagnosis and guesswork is test equipment and methodology. A visual inspection tells you what you can see. A multifunction installation tester tells you the insulation resistance of every conductor in a circuit, the earth continuity, and the impedance at every point, and it finds faults that are completely invisible to the eye.
The process: identify which circuit is affected and confirm the symptoms. Isolate variables, appliances first, then fixed wiring. Test the circuit wiring with an insulation resistance meter to check for degraded insulation or earth leakage. Check continuity of the neutral conductor, which fails silently in ways that cause unpredictable behaviour. Inspect accessible connections at sockets, switches, and any junction boxes.
Most faults show up within the first hour of proper testing. Fault finding is £60 plus VAT an hour. At two hours I stop, tell you what I have found and what I think the repair will take, and you decide whether to carry on. When the cause is found, I explain what it is and give you a clear written price for the repair before doing anything. The repair is priced and agreed separately.
Before you call — what to try first
For an RCD that keeps tripping: unplug everything on the affected circuit and reset. If it stays on, plug things back one at a time, the one that trips it is the fault. If it trips with nothing plugged in, the fault is in the fixed wiring and I need to come out. See the full guide to tripping RCDs.
For a dead circuit: check the consumer unit for a tripped MCB or RCBO. Sometimes they trip to the middle position rather than fully off, push fully off and then back on. If it trips immediately on reset, call me. If the MCB isn’t tripped and the circuit is still dead, there’s likely a wiring fault or a failed connection.
What fault finding costs
Fault finding is £60 plus VAT an hour. At two hours I stop, tell you what I have found and what I think the repair will take, and you decide whether to carry on. Most faults are identified within one to two hours. You only pay for fault finding time up to the point where the cause is identified, and the repair is a separate price agreed with you before any repair work starts.
Common questions
Can you find an intermittent electrical fault?
Intermittent faults are the hardest to diagnose because they may not be reproducible on demand. The approach is methodical: test the insulation resistance of the circuit wiring to check for degraded insulation that breaks down under load or temperature, check connection quality at every accessible junction, and look for environmental triggers (moisture, heat, vibration). Most intermittent faults have a physical cause that shows up under proper testing even when the fault is not actively occurring.
Is fault finding an emergency service?
For symptoms that indicate immediate risk (burning smell, scorch marks, sparks, water ingress, RCD will not reset with everything unplugged), yes, we treat as same-day. For an intermittent trip that resets fine, normal scheduling applies. See the emergency electrician page for what counts as urgent.
What test equipment do you use?
A calibrated multifunction installation tester: insulation resistance tester at 500 V DC, low-ohm continuity meter, earth fault loop impedance meter, RCD tester with trip-time measurement at 30 mA and 150 mA. Calibration certificates available on request. Results are recorded on a BS 7671 schedule of test results, which becomes the evidence base for the repair scope.
Why does my circuit keep tripping?
The most common causes are a faulty appliance drawing too much current or leaking current to earth, deteriorating insulation on wiring (especially in older properties), moisture ingress in outdoor sockets or fittings, a failing RCD that has become oversensitive, or a genuine overload from too many high-demand appliances on the same circuit. Diagnosis requires isolating which circuit is affected, testing the insulation resistance of the wiring, and methodically eliminating appliances and fixed wiring elements to identify the source.
Electrical fault finding in York
Tell me the symptoms and I'll give you an honest view of what is likely involved, and confirm the rate before I come out.