Fixing a Ground Fault Circuit Interrupter (GFCI) outlet that refuses to reset requires a systematic diagnostic and repair process. First, isolate power by turning off the circuit breaker and verifying zero voltage. Second, remove the wall plate and inspect the wiring connections; ensure incoming power wires are attached to the "Line" terminals and downstream wires are on "Load" terminals. Third, check for moisture or short circuits downstream. You can troubleshoot GFCI faults safely. You can verify that your corrective action is successful when correcting wiring errors, drying out any moisture, or replacing a failed GFCI unit allows you to press the reset button firmly inward until it clicks and holds power.
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