How to Replace a GFCI Outlet Safely (Kitchen, Bath & Garage)
Time required: 20-30 mins · Difficulty 3/5
GFCI outlets are a critical shock-protection device required by code near water sources. Always shut off the breaker and verify the outlet is dead with a voltage tester before touching any wires. If you're unsure which breaker controls the outlet, or the box has more than 3 wire groups, stop and call a licensed electrician.
Est. DIY Parts: $12 - $22 · Pro Service: $130 - $200 · Est. Savings: $110 - $185
* Estimates based on regional/national contractor rate benchmarks. Actual part prices vary by brand and retailer.
Parts & Tools You'll Need
- Tamper-Resistant GFCI Outlet (15A or 20A)
- Wire Nuts (Assorted Pack)
- Non-Contact Voltage Tester
- Insulated Screwdriver Set
- Wire Strippers
Step-by-Step Manual
- Turn off the breaker and verify it's dead Switch off the exact breaker for the outlet, then remove the cover plate and test every wire and terminal with a non-contact voltage tester before touching anything.
- Remove the old GFCI and photograph the wiring Unscrew the outlet from the box and pull it out gently. Take a clear photo of which wires connect to LINE vs LOAD terminals before disconnecting anything.
- Identify LINE vs LOAD wires The LINE wires are the ones with power at all times (test with your tester with the old outlet still connected before you fully disconnect, if unsure). Label them clearly.
- Disconnect the old outlet Loosen the terminal screws and free each wire — black (hot) to brass, white (neutral) to silver, bare copper/green to ground.
- Wire the new GFCI outlet Connect the LINE wires to the terminals marked LINE on the new GFCI, and any downstream LOAD wires to the terminals marked LOAD, matching your reference photo.
- Mount, restore power, and test Fold the wires into the box, screw in the new GFCI, attach the cover plate, restore the breaker, then press TEST (should cut power) and RESET (should restore it) to confirm it's working.