How to Test GFCI Outlets
Ground Fault Circuit Interrupter outlets are life-saving devices that cut power within milliseconds when they detect electricity flowing through an unintended path—like through water or a human body. This quick safety check involves pressing the TEST button on each GFCI outlet to verify it trips, then pressing RESET to restore power. Taking just 2-5 minutes twice a year to test these outlets ensures they'll protect your family from electrocution in kitchens, bathrooms, garages, outdoor areas, and anywhere water and electricity might meet.
Cost to Skip This Task
Risk $200 – $10,000 in repairs
Why It Matters
GFCI outlets prevent electrocution by cutting power when they detect current leaking to ground (like through water or a person). They protect you in kitchens, bathrooms, and outdoor areas where water is present. Test every 6 months—some experts recommend monthly. Replace any GFCI that won't trip when you press TEST, or won't reset after tripping. GFCIs typically last 10-15 years but can fail sooner in harsh environments.
Safety First
- Never test GFCI outlets with wet hands
- If a GFCI will not reset, do not use that outlet until it is repaired
What You'll Need
Tools
- Night light or small lamp for testing$3
Step-by-Step Instructions
Before You Start
Locate all GFCI outlets - they have "TEST" and "RESET" buttons. They are required in bathrooms, kitchens, garages, outdoors, laundry rooms, and near water sources.
- 1
Press the "TEST" button on the GFCI outlet - you should hear a click and power should cut off
- 2
Verify power is off by plugging in a device (like a night light) and confirming it turns off
- 3
Press the "RESET" button to restore power
- 4
Verify the outlet works again with your test device
- 5
Repeat for all GFCI outlets in the home
One GFCI outlet often protects multiple downstream outlets. If a regular outlet near water does not work, check nearby GFCIs
How to Verify Success
Every GFCI trips when TEST is pressed and restores power when RESET is pressed. All protected outlets lose power during the test.
When to Call a Professional
- A GFCI will not trip when you press TEST (replacement $100-200 including outlet)
- A GFCI will not reset after tripping (replacement $100-200)
- You do not have GFCI outlets in required locations (new installation $150-250 per outlet)
- GFCI trips frequently during normal use (diagnosis $100-150, wiring repair $200-500)
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