How to Fix a Broken GFCI Outlet: Step-by-Step Guide

Frequently Asked Questions

How do I know if my GFCI outlet is faulty and not just tripped?

Press the Reset button firmly — it should click and the outlet should restore power. If pressing Reset does nothing, the outlet stays dead after resetting, or the Reset button won't stay latched, the GFCI device itself has failed and needs replacement. A working GFCI trips and resets cleanly every time.

Why does my GFCI outlet keep tripping?

Nuisance tripping usually points to a moisture problem (common in bathrooms and outdoors), a failing appliance plugged into the circuit, or a GFCI that has worn out after years of tripping. Try unplugging everything on the circuit and resetting — if it holds, plug devices back in one at a time to find the culprit. If it trips with nothing plugged in, replace the GFCI.

Can I replace a GFCI outlet myself without an electrician?

Yes — GFCI replacement is one of the most beginner-friendly electrical repairs. As long as you turn off the breaker, confirm power is off with a non-contact voltage tester before touching any wires, and match the wire connections correctly, the job is very safe. Most homeowners complete the swap in under 30 minutes.

What does it mean when a GFCI outlet has LINE and LOAD terminals?

LINE terminals connect to the wires coming from the breaker panel — this is the incoming power. LOAD terminals connect to any outlets or fixtures downstream that you want the GFCI to protect. If you only need to protect the one outlet, leave the LOAD terminals unused and cap any wires attached to them with wire nuts. Wiring LINE and LOAD backwards is a common mistake that will prevent the GFCI from working.

How many outlets does one GFCI protect?

A single GFCI outlet can protect itself and all outlets wired downstream of it on the same circuit through its LOAD terminals. In a bathroom, for example, one GFCI near the sink often protects additional outlets on the same circuit. This is why a tripped GFCI in one room can kill outlets in another — they are daisy-chained through the LOAD connection.

What amperage GFCI outlet should I buy as a replacement?

Match the amperage of the circuit breaker protecting that circuit. Most standard household circuits are 15-amp (use a 15A GFCI) or 20-amp (use a 20A GFCI — identifiable by the T-shaped neutral slot). Installing a 15A GFCI on a 20A circuit is a code violation. When in doubt, check the breaker label or use a 20A GFCI, which is safe on 15A circuits.

Fixing a dead GFCI outlet: (1) Press RESET — the button may have tripped without an obvious cause. Many GFCI outlets protect downstream non-GFCI outlets, so check if other outlets are also dead.

A GFCI (Ground Fault Circuit Interrupter) outlet is the one with the two small buttons — Test and Reset — typically found in bathrooms, kitchens, garages, and outdoor areas. Its job is to cut power instantly when it detects a ground fault, protecting you from electric shock. When it stops working, you lose power to the outlet and potentially to other outlets on the same circuit.

The good news: diagnosing and replacing a GFCI is one of the most beginner-friendly electrical repairs in the house. This guide walks you through testing, resetting, and fully replacing a failed GFCI outlet.

What You Need

• Non-contact voltage tester — essential for confirming power is off before touching wires
• GFCI outlet replacement 15A or 20A — match your circuit’s amperage
• Screwdrivers — flathead and Phillips
• Wire strippers (if needed for damaged wire ends)
• Needle-nose pliers
• Electrical tape

Step 1: Test the GFCI Before Replacing It

Before buying anything, confirm the outlet is actually failed and not just tripped. Locate the outlet and press the Reset button firmly until you hear a click. Check whether power is restored using a lamp or phone charger.

If power returns after pressing Reset, the GFCI was simply tripped by a ground fault — possibly caused by a wet appliance, moisture intrusion, or an overloaded circuit. Unplug everything on the circuit and reset once more. If it holds, plug devices in one at a time to identify the cause.

Press the Test button. The outlet should lose power immediately. Press Reset to restore it. If the outlet does not respond to Test or Reset, the GFCI has failed internally and replacement is needed.

Step 2: Check for a Tripped Upstream GFCI

One tripped GFCI can cut power to other outlets downstream. Before replacing anything, walk through your home and check every GFCI outlet in bathrooms, the kitchen, garage, and outdoors — pressing Reset on each one. A tripped GFCI in the garage, for example, commonly kills bathroom outlets in adjacent areas.

Also check your breaker panel. A tripped breaker will have its toggle sitting between On and Off. Push it firmly to Off, then back to On to reset it.

Step 3: Turn Off the Breaker

Once you have confirmed the GFCI itself needs replacement, go to the main panel and turn off the breaker for that circuit. Breakers are typically labeled — look for “Bath,” “Kitchen,” “Garage,” or the room name. If labels are vague, use a lamp plugged into the outlet to confirm which breaker cuts the power.

With the breaker off, hold your non-contact voltage tester near the outlet. The tester should give no signal. This is not optional — always verify power is off before opening an electrical box.

Step 4: Remove the Old GFCI Outlet

Remove the outlet cover plate with a flathead screwdriver. Unscrew the two mounting screws holding the outlet to the electrical box. Gently pull the outlet out of the box — there will be several inches of wire connected to the back.

Look at the wires. Most residential wiring uses:

• Black = hot (LINE hot connects here)
• White = neutral
• Green or bare copper = ground

Note which wires go to LINE terminals and which go to LOAD terminals before disconnecting anything. Taking a photo with your phone at this stage saves significant troubleshooting time.

Loosen the terminal screws and unhook each wire, or use a small flathead to release push-in (backstab) connections. Inspect the wire ends — if they are nicked, corroded, or too short, strip a fresh 3/4-inch section with wire strippers.

Step 5: Wire the New GFCI Outlet

New GFCI outlets come with tape covering the LOAD terminals. Unless you need to protect downstream outlets, leave this tape in place and connect wires only to the LINE terminals.

• Connect the black wire to the LINE hot terminal (brass-colored screw, labeled LINE HOT or marked on the back).
• Connect the white wire to the LINE neutral terminal (silver-colored screw, labeled LINE NEUTRAL).
• Connect the ground wire to the green ground screw.

Tighten each screw firmly — loose connections cause heat and arcing. Do not use the backstab push-in holes on GFCI outlets; screw terminals are safer and more reliable.

If the box contains multiple cables (indicating downstream outlets protected through the LOAD terminals), reconnect the downstream cable to the LOAD terminals on the new GFCI. Match the same configuration as the original.

Step 6: Reinstall and Test

Carefully fold the wires into the box and push the GFCI in. It should sit flush against the box face. Tighten the mounting screws — snug, not over-tightened, or you will crack the outlet body. Install the cover plate.

Go to the breaker panel and turn the circuit back on. Return to the outlet and press Reset — it should click and latch. Plug in a lamp or phone charger to confirm power. Press Test — the outlet should cut power. Press Reset again — power should restore.

If the outlet does not power up after resetting, double-check that LINE and LOAD wires are not swapped. If the breaker immediately trips, there is a wiring issue that requires a licensed electrician to diagnose.

When to Call an Electrician

Call a licensed electrician if the breaker trips as soon as it is turned on, if you find wiring that is aluminum (silver-colored, not copper), if you see burn marks or melted insulation inside the box, or if the box has more wires than you can confidently trace.

Related Reading

• How to Fix a Broken Light Switch
• How to Replace a Standard Electrical Outlet
• How to Install a Ceiling Fan
• How to Add an Electrical Outlet — add a new outlet circuit where you need one