How to Replace a Bathroom GFCI Outlet

GFCIs are the unsung heroes of the bathroom, standing between you and a dangerous shock every time you use a blow dryer near the sink. Over time, the internal sensing mechanism wears out, leaving the outlet unable to reset. When that little light stops glowing or the button won't stay depressed, it is time for a replacement. Done well, this repair is a straightforward swap that ensures your bathroom remains code-compliant and safe. Precision is your best friend here; taking a clear photo of the existing wiring before you disconnect a single strand will save you from guessing which wire belongs to the 'line' and which belongs to the 'load' terminals.

  1. Kill Power First. Head to your main electrical panel and flip the breaker that controls the bathroom circuit to the off position. Verify the power is dead by plugging in a lamp or using a non-contact voltage tester on the outlet face.
  2. Pull Old Unit Out. Unscrew the wall plate and remove the mounting screws from the outlet box. Gently pull the GFCI out of the wall, taking care not to strain the wires connected to the back.
  3. Document Wire Routes. Identify the 'line' wires (power coming from the panel) and the 'load' wires (power feeding other outlets). Take a photo of the connections before disconnecting anything so you know exactly which wire goes to which terminal.
  4. Free All Wires. Loosen the terminal screws on the old GFCI and release the wires. Straighten the copper ends if they are mangled; if the wire is heavily nicked or corroded, trim back to fresh copper and re-strip the end.
  5. Connect New Outlet. Connect the wires to the new unit, ensuring the 'line' wires go to the terminals marked 'line' and the 'load' wires go to the terminals marked 'load'. Tighten the terminal screws firmly against the wire loops or pressure plates.
  6. Restore Power & Verify. Carefully fold the wires back into the box and screw the GFCI into place. Restore power at the breaker, press the 'reset' button on the outlet, and test it with a circuit tester to ensure proper operation.