How to Replace a GFCI Outlet

Learn how to identify LINE and LOAD conductors, replace a worn GFCI and test downstream protection safely.

Understand the job

Confirm the device is actually defective by checking the breaker and any upstream GFCI first.

What to inspect first

Turn off the correct breaker and verify power is absent at every conductor in the box.

Step-by-step approach

Label the incoming LINE conductors before removing the old device. Downstream protected wires belong on LOAD only when protection is intended.

Common warning signs

Transfer one conductor group at a time to the clearly marked terminals on the new device.

Final checks

Restore power, press RESET, then TEST. Confirm the GFCI trips and that any intended downstream outlets lose power.

Tools and materials to plan for

The exact list depends on the product and site, but plan for measuring tools, suitable personal protection, manufacturer-approved fasteners or fittings, cleanup supplies and a reliable way to verify the finished work.

Common mistakes to avoid

• Replacing parts before identifying the cause
• Skipping measurements and product instructions
• Using materials not rated for the location
• Closing the repair before checking hidden damage
• Failing to test the completed work

Should you DIY or hire help?

A careful homeowner can often handle straightforward maintenance and replacement work. Hire help when access is difficult, hidden damage appears, permits or licensing may apply, or the repair crosses into structural, electrical, roofing or plumbing systems that require specialized experience.