How to Troubleshoot a GFCI

A GFCI, or Ground Fault Circuit Interrupter, is an outlet that's designed to instantaneously trip when the voltage goes to ground. They are required for use within six feet of any wet location in order to prevent accidental shock or electrocution. Troubleshooting a GFCI is a relatively simple job, and one that's not too different from troubleshooting a traditional outlet.

Difficulty: Moderately Easy

Instructions

Things You'll Need:

• Screwdriver
• Outlet tester (plug-in type with GFCI trip button)
• Multi-tester

Quick GFCI Troubleshooting

1. Look at the front of the GFCI outlet and you will see two buttons--one marked "Trip" and one marked "Reset." Press the Reset button to see if it clicks back into place. If it does, insert the plug-in tester into the outlet to make sure it is receiving voltage and that it is wired correctly. If the Reset button is already pushed in and the outlet is still not working, proceed to Step 2.

2. Check the outlets on both sides of the GFCI outlet for voltage using the plug-in tester. If you have more than one GFCI outlet on the same circuit, one may be tripped. When this happens, every outlet on the circuit after the tripped one will have no power.

3. Check the electrical panel to determine if there is a breaker that has tripped or been turned off.

Further GFCI Troubleshooting

4. Turn off the circuit breaker that provides power to the GFCI outlet.

5. Unscrew and remove the cover plate from the GFCI outlet.

6. Remove the two screws that secure the GFCI to the wall box and carefully pull the outlet out of the box using the top and bottom tabs.

7. Test the wires for voltage to make sure the line is off, then check the wires for any loose connections or broken leads. If everything looks to be in good shape, continue to Step 5.

8. Turn the circuit breaker back on and test the wires connected to the GFCI outlet for voltage. Use caution when doing this, as the wires may be live.
   
   If you have voltage coming to the outlet but it still isn't working, the outlet is bad.
   
   If you still don't have voltage coming to the outlet, there may be a break in the line or a problem with the breaker. Call a licensed electrician to further troubleshoot the line.

Tips & Warnings

• Use extreme caution when troubleshooting any electrical circuit. If you are not sure of your abilities, please call a licensed electrician to perform the job.