GFCI Not Working

Quick answer

Turn off power at the breaker, press the reset button on the GFCI outlet. If it won't reset, test with a voltage tester. If no power, replace the outlet or check the circuit breaker.

Confirm the symptom

• GFCI outlet won't reset after tripping
• No power to the GFCI outlet or downstream outlets
• GFCI outlet trips immediately after resetting
• Test button doesn't trip the outlet
• Flickering lights or buzzing sound when using the outlet

Tools and prep

• Voltage tester
• Screwdriver set
• Wire stripper
• Multimeter
• Needle-nose pliers

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Prep & safety

• Turn off power to the GFCI outlet at the circuit breaker.
• Use a voltage tester to confirm power is off before working on the outlet.
• Ensure the area is dry and free from water or moisture.
• Wear rubber-soled shoes and insulated gloves for safety.

Step-by-step troubleshooting

1. Test the GFCI outlet
   Do: Press the test button on the GFCI outlet. It should trip and cut power.
   Observe: The outlet should trip and the reset button should pop out.
   Means: The GFCI is functioning correctly if it trips.
   Next: If it doesn't trip, proceed to the next step.
2. Reset the GFCI outlet
   Do: Press the reset button on the outlet until it clicks.
   Observe: The reset button should stay in and power should return.
   Means: The outlet has reset and is working properly.
   Next: If it doesn't reset, proceed to the next step.
3. Check for power at the outlet
   Do: Use a voltage tester to check if power is reaching the outlet.
   Observe: The voltage tester should light up if power is present.
   Means: Power is reaching the outlet, so the issue is likely with the GFCI itself.
   Next: If no power is detected, proceed to the next step.
4. Inspect the wiring
   Do: Carefully remove the outlet cover and inspect the wiring connections.
   Observe: Wires should be securely connected and not damaged.
   Means: Loose or damaged wires can prevent the GFCI from working.
   Next: If wiring is damaged, proceed to the next step.
5. Replace the GFCI outlet
   Do: Turn off the power and replace the faulty GFCI outlet with a new one.
   Observe: The new outlet should reset and provide power.
   Means: The GFCI outlet was faulty and needed replacement.
   Next: If the new outlet still doesn't work, proceed to the next step.
6. Check the circuit breaker
   Do: Inspect the circuit breaker for the GFCI outlet to see if it's tripped.
   Observe: The breaker should be in the 'on' position.
   Means: A tripped breaker can prevent power from reaching the outlet.
   Next: If the breaker is tripped, proceed to the next step.

Common causes

Parts you might need

When replacing a GFCI outlet, ensure the new one matches the following specifications:

• GFCI outlet: match the amperage and voltage rating of the old outlet
• Wire size: match the gauge of the existing wires (usually 14 or 12 gauge)
• Mounting box: ensure the new outlet fits the existing electrical box

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Check the label on the old GFCI outlet for the amperage and voltage ratings before purchasing a replacement.

When to call a professional

• The GFCI outlet still doesn't work after replacement.
• You detect a burning smell or see signs of electrical arcing.
• The circuit breaker continues to trip after resetting.
• You're unsure about the wiring or electrical system.
• Multiple outlets or circuits are affected.

FAQ

Related guides

• GFCI outlet keeps tripping