A Ground-Fault Circuit-Interrupter (GFCI) outlet that has failed typically exhibits clear operational failure indicators, such as failing to trip when the manual TEST button is pressed, tripping constantly without any apparent ground fault or moisture present, or refusing to hold a RESET state entirely. Additionally, physical warning signs include a completely dead faceplate where downstream plugs receive no power, intermittent power delivery, or visible discoloration, scorching, and melting around the plastic housing due to internal component degradation. Verification: Press the TEST button; if the reset button does not pop out or power remains active, the internal sensor has failed and requires immediate replacement.
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