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METHODOLOGY

How the GFCI reset diagnostic works

The ranking is rules, not opinion — here is exactly how an answer set becomes a ranked result and a safe next check.

source-governed Diagnostic estimate. Not a quote, not a substitute for a licensed electrician. sources verified 2026-06-20 view sources ↓

Method

  1. Each answer maps to transparent rules; the rules that fire and their weights are shown as a trace, so the ranking is inspectable rather than asserted.
  2. A GFCI requires power on its LINE terminals to reset, so if power is unknown the tool fails closed and asks you to establish it before ranking anything.
  3. Weights are relative signal, not probabilities. Causes below the leader are kept visible so an excluded cause can be confirmed, not hidden.

Sources

Where to stop. Resetting and plug-in testing are homeowner-safe. Opening the box, checking terminals, or rewiring line/load means live conductors — if you cannot do that safely with the power off at the breaker, stop and call a licensed electrician. Water plus electricity is a shock hazard; do not keep resetting a wet outlet. This is general information, not a quote and not a substitute for a licensed electrician.

Use the tool

Electrical Fault Check provides general diagnostic information only. It is not professional advice, not a quote, and not a substitute for a licensed electrician. Do not work on live wiring. If you see smoke, sparks, burning smell, heat, shock, water exposure, or repeated tripping, stop using the circuit and contact a licensed electrician or emergency services as appropriate.