When a brand-new Ground Fault Circuit Interrupter (GFCI) outlet continues to trip immediately or repeatedly even after a complete hardware replacement, it proves definitively that the problem is not the receptacle itself, but rather an external electrical issue on the circuit. Primary causes include moisture trapped inside outdoor, garage, or bathroom junction boxes, an appliance with an aging internal winding leaking current to ground, pinched or damaged wire insulation inside the wall box, or incorrect wiring where line and load wires are reversed. You can troubleshoot persistent tripping safely by unplugging all devices connected downstream. You can verify that your corrective action is successful when drying wet boxes, correcting wiring errors, or isolating faulty appliances stops the repeated tripping and allows stable power delivery.
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