How to Test a GFCI Outlet (And What to Do If It Won't Reset)
- McCray's Home Services
- Jul 1
- 3 min read
Have you ever noticed the outlets in your bathroom or kitchen with the little "Test" and "Reset" buttons? Those are called Ground Fault Circuit Interrupter (GFCI) outlets, and they're one of the most important electrical safety devices in your home.
GFCI outlets are designed to quickly shut off power if they detect an electrical fault, helping reduce the risk of electrical shock in areas where water and electricity may come into contact.
Fortunately, testing them only takes about a minute.
What Is a GFCI Outlet?
A GFCI outlet continuously monitors the flow of electricity. If it senses even a small imbalance—such as electricity flowing through water or a person—it automatically cuts power in a fraction of a second.
These outlets are commonly installed anywhere moisture may be present.
You will often find GFCI protection in:
Bathrooms
Kitchens
Laundry rooms
Garages
Outdoor outlets
Utility rooms
Crawl spaces
Unfinished basements
Keep in mind that one GFCI outlet may protect several standard outlets located farther down the same circuit.
How to Test a GFCI Outlet
Testing a GFCI outlet is simple and only takes a minute.
Step 1: Plug in a Lamp or Nightlight
Plug a small lamp or nightlight into the outlet and make sure it's receiving power.
Step 2: Press the "Test" Button
Press the Test button on the outlet.
The lamp should immediately turn off. This confirms the outlet has interrupted power as designed.
Step 3: Press the "Reset" Button
Press the Reset button.
The outlet should click, and power should be restored. Your lamp should turn back on.
If everything works as described, your GFCI outlet has successfully passed a basic function test.
What If the Outlet Won't Reset?
If your GFCI won't reset, don't panic. There are several possible causes.
It could be:
Another GFCI on the same circuit has tripped.
Moisture is present in an outdoor outlet or electrical box.
An appliance plugged into the circuit has developed a fault.
The GFCI outlet itself has reached the end of its service life.
There is an electrical issue that requires further diagnosis.
Start by unplugging any appliances connected to the outlet and try pressing the Reset button again.
If the outlet still won't reset—or repeatedly trips after being reset—it's important to determine why before continuing to use the outlet. A GFCI is designed to interrupt power when it detects a potential problem, so repeated tripping shouldn't be ignored. If you're unable to restore normal operation, it's a good idea to have the outlet evaluated.
How Often Should You Test GFCI Outlets?
Most GFCI manufacturers recommend testing these outlets once a month using the built-inTest and Reset buttons. It's a simple task that takes less than a minute and helps verify that this important electrical safety feature is operating properly.
Many homeowners find it easy to add this task to their monthly home maintenance routine along with changing HVAC filters, testing smoke alarms, or performing other seasonal home maintenance.
When Should a GFCI Outlet Be Replaced?
A GFCI outlet should be evaluated if it:
Fails to trip when the Test button is pressed.
Will not reset.
Frequently trips without an obvious cause.
Shows signs of physical damage, discoloration, or overheating.
Feels loose in the electrical box.
Like other electrical safety devices, GFCI outlets can wear out over time. If one fails its built-in test, won't reset properly, or shows signs of damage, it should be evaluated and replaced if necessary.
A Small Test That Can Make a Big Difference
Testing your GFCI outlets takes less than a minute, but it's one of the easiest ways to verify that an important electrical safety feature in your home is functioning as intended.
If one of your GFCI outlets won't reset, repeatedly trips, or you're unsure whether it's operating properly, McCray & Sons Home Services can inspect the outlet, identify the cause of the problem, and recommend the appropriate repair or replacement so you can have confidence your home's electrical system is operating safely.