Yes, a Ground Fault Circuit Interrupter (GFCI) safety outlet can degrade internally and go bad while still appearing to deliver normal power to plugged-in appliances. Over time, internal electronic monitoring components, silicon-controlled rectifiers, or mechanical tripping solenoids can wear out or suffer damage from power surges, meaning the receptacle will supply 120 volts but fail to trip when the manual "Test" button is pressed, leaving you unprotected against electrical shocks. You can troubleshoot GFCI safety easily by pressing the test and reset buttons monthly. You can verify that your corrective action is successful when replacing an old, non-responsive GFCI with a new self-testing unit ensures reliable trip protection and shock prevention.
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