Yes, GFCI outlets can and do fail — and when they do, they may stop protecting you without any obvious warning sign. A GFCI (Ground Fault Circuit Interrupter) outlet contains a sensitive electronic circuit that monitors current flow and trips within milliseconds if it detects a ground fault. Like any electronic component, that circuit degrades over time, especially in humid, dusty, or high-heat environments common in Colorado homes.

How a GFCI Works and Why It Fails

A GFCI monitors the current going out through the hot wire and returning through the neutral wire. If those two readings differ by even 4 to 6 milliamps — a level that can cause cardiac arrest — the outlet trips and cuts power. That trip mechanism relies on a small internal circuit board and a mechanical relay. Heat cycles, moisture intrusion, power surges, and simply age wear those components down.

The tricky part: a failed GFCI can still supply power to the outlet. Devices plug in and work normally, so there’s no immediate clue that the ground-fault protection has stopped functioning. You’re using a live outlet that offers zero shock protection. This is why regular testing matters.

Signs Your GFCI May Have Gone Bad

Watch for these indicators:

  • The TEST button doesn’t trip the outlet when pressed, or the RESET button doesn’t stay in
  • The outlet trips immediately when you reset it
  • The outlet trips randomly without any apparent cause
  • The TEST/RESET buttons feel loose or mushy rather than clicking firmly
  • The outlet is more than 10–15 years old and has never been tested
  • The outlet is in a high-moisture area (bathroom, kitchen, garage, outdoors) and has been exposed to water

How to Test a GFCI Outlet

Testing is simple and should be done monthly for outlets in bathrooms, kitchens, garages, and outdoor locations. Press the TEST button — you should hear a click and the outlet should lose power (you can verify with a lamp or phone charger plugged in). Then press RESET; the outlet should click back on and restore power. If pressing TEST doesn’t cut power, or if RESET won’t hold, the outlet has failed and needs to be replaced.

One note on older GFCI outlets: some models manufactured before the mid-2000s had a design flaw where the outlet could pass the manual test but still fail to trip during an actual ground fault at the low-current thresholds that cause electrocution. If your GFCI outlets are more than 15 years old, replacing them proactively is worth doing regardless of test results.

GFCI Outlets in Colorado Homes

Colorado’s climate creates conditions that shorten GFCI lifespan. Denver’s low humidity causes static discharge that can stress electronic components. Outdoor GFCI outlets face intense high-altitude UV exposure, wide temperature swings from -10°F winters to 100°F summer afternoons, and frequent freeze-thaw cycles that can crack outlet covers and allow moisture into the housing. Garage outlets are often exposed to dust and temperature extremes year-round. If you have a GFCI outlet that hasn’t been tested recently and lives in any of those environments, it’s a candidate for inspection.

When to Call an Electrician

Replacing a single GFCI outlet is a straightforward job for a licensed electrician, typically completed in under an hour. It’s also a good time to confirm that downstream outlets on the same circuit — regular outlets that are protected by one upstream GFCI — are wired correctly and still receiving that protection. Done’s electricians can test and replace GFCI outlets throughout your home and verify that every location required by code is properly protected. Visit our outlets and switches page to schedule service, or call for emergency electrical help if a failed GFCI is part of a larger electrical problem.