10/26/2026
A GFCI is one of those devices homeowners rely on without ever testing. That is a mistake. These are safety devices, not decorations. Their job is to cut power when the device senses a dangerous imbalance that could mean electricity is going where it should not, including through a person. Kitchens, bathrooms, garages, exterior outlets, unfinished spaces, and other damp or grounded locations depend on them working when needed, not just looking normal on the wall.
Here is the field routine. Plug in a lamp or tester, press the TEST button, confirm power drops, then press RESET and confirm power returns. If it will not trip, will not reset, or behaves inconsistently, that outlet needs attention. And remember, one GFCI can protect multiple downstream receptacles, so the problem may affect more than one location.
The U.S. Consumer Product Safety Commission says every GFCI should be tested after installation, at least once a month, and after a power failure. If it fails the test, the guidance is simple. Contact a qualified electrician. That is exactly how I teach it. If you want a maintenance inspection that includes practical safety checks, MAKO Home Inspection can help.