When you press the "Reset" button on a Ground Fault Circuit Interrupter (GFCI) outlet but power fails to return to the receptacle or downstream devices, it typically indicates several specific electrical problems. The most common cause is that the GFCI lacks incoming line voltage because a breaker has tripped at your main service panel or an upstream switch is off. Alternatively, a persistent ground fault or short circuit on the load side will prevent the internal latching mechanism from holding power. You can troubleshoot power loss safely using a multimeter. You can verify that your corrective action is successful when checking incoming power with a tester, eliminating downstream faults, or replacing a failed unit restores stable 120-volt output.
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