YOUR FAULT FINDING ENQUIRY
Planning your fault finding job
Ask for electrical fault investigation when a circuit trips, equipment loses power or a problem is intermittent.
What to include in your enquiry
- Circuit and trip pattern
- Equipment in use
- Previous tests and changes
What should the quote cover?
Agree diagnostic scope, findings and approval for repair beyond the investigation.
Should I repeatedly reset a circuit that trips?
No. Stop repeated resets and seek suitable assessment, particularly where there are heat, burning or damage signs.
Local property and responsibility checks
A neighbourhood outage and an internal installation problem need different help. Use 105 for the network operator rather than treating it as an electrician booking line.
- Circuit and trip pattern
- Equipment in use
- Previous tests and changes
Further guidance: UK Power Networks 105
What fault finding is buying
Quick answer
Enquire about investigating repeated tripping, intermittent faults or unexplained loss of power within the installation, with testing and repair scope agreed separately.
Fault finding is an investigation into why the system behaves unexpectedly. It may identify a damaged connection, unsuitable equipment or an issue requiring further access, but the first visit cannot always produce a complete remedy. Ask what the initial fee buys and how the electrician will explain findings before repair work is authorised. A diagnosis-led visit differs from an EICR, which assesses condition under an agreed inspection scope. Neither should be sold as a guarantee that every hidden fault will be found immediately.
Useful next steps
Intermittent faults need a timeline
What to tell the electrician
Record when the problem happened, which rooms or equipment were affected and any ordinary activity immediately beforehand. Include whether it followed rain, a recent installation or building work, without treating that association as proof. A fault absent during the visit can be harder to locate, so this history is useful. Do not deliberately reproduce an unsafe event or leave a damaged item running for demonstration. Keep prior invoices and test records available; they can help the professional distinguish a new symptom from an unresolved earlier issue.
- What stopped working, and when it happened.
- Whether the symptom is constant or comes and goes.
- Recent work, weather association and previous findings.
| Observation | Information to record |
|---|---|
| One room or several rooms | Affected areas and equipment from ordinary use. |
| Intermittent symptom | Date, time and normal activity beforehand. |
| After recent work | What changed and who carried it out. |
| Signs of heat or damage | Seek direct help; do not test the fault again. |
Recurring trips and repeated resetting
A protective device operating is a warning to investigate the cause, not an inconvenience to defeat. Do not hold a switch on, bypass protection or keep resetting after a recurring fault. Avoid opening the consumer unit or changing protective devices. Tell the electrician which label appears affected from a safe normal view and whether the rest of the property still has power. Labels may be inaccurate, so they are starting information rather than proof of circuit identity. Direct urgent contact is needed if there is heat, damage, smoke or exposed parts.
One circuit, the whole property or the network?
Explain whether neighbouring properties appear affected, without approaching network equipment. UK Power Networks provides the 105 route for power cuts and network concerns. A fault inside a property needs a different assessment from a supply outage. If the issue concerns the meter or incoming equipment, do not interfere with it; the network operator or relevant supplier should direct the next step. A domestic electrician’s quoted repair does not automatically include work on equipment controlled by another organisation.
Investigation limits and access
Agree which areas and equipment the electrician can inspect, whether the occupier can allow power interruptions and who approves opening finishes. A short diagnostic allowance may not cover concealed wiring across several rooms. Ask for findings expressed as observations, test results and remaining uncertainties. If another visit or specialist is needed, the reason should be clear. Record any equipment left disconnected or circuit left unavailable, and what must happen before it is used again. A limitation in access should not silently become a claim that the inaccessible part is safe.
For a business property, tell the electrician which operations depend on the affected supply and who can approve an interruption. The investigation may need a planned period with equipment unavailable. Agree safe access, an on-site contact and the records needed at handover. A domestic-style appointment description may not cover a commercial installation or specialist machinery.
Fees and authorising the remedy
Ask before attendance
Request the attendance charge, investigation allowance, charging method after that allowance and VAT. A confirmed diagnosis should lead to a separate explanation of the remedy, materials and testing before substantial extra work. Ask how return visits are charged if the intermittent symptom is absent. A lower initial fee can cover less time or a narrower scope, so compare what you receive and how decisions will be recorded.
- How much investigation is included?
- Who approves extra time and repair materials?
- What findings and safety arrangements will be recorded?
Give the fault pattern and property authority
Record the circuit, time, equipment operating and previous test findings. Confirm authority to investigate a rented installation; give evidence rather than a presumed town-wide cause.
Sources: Mid Suffolk repair responsibilities