GFCI Outlets and Why They Trip

GFCI outlets are the ones with "test" and "reset" buttons, usually in kitchens, bathrooms, garages and outdoors. They are designed to cut power quickly to protect you from shock. When one trips now and then, it is doing its job. When it trips constantly, something needs attention.

What a GFCI does

GFCI stands for ground fault circuit interrupter. It monitors the current flowing out on the hot wire and back on the neutral wire. If the two do not match, some current may be leaking through an unintended path, possibly a person. The GFCI shuts off power in a fraction of a second.

A GFCI is different from a circuit breaker. A standard breaker protects wiring from overloads and short circuits. A GFCI protects people from shock. Some breakers include GFCI protection too.

Why GFCIs are where they are

Building codes require GFCI protection in places where water and electricity are likely to meet. Common locations include bathrooms, kitchens near counters, laundry areas, garages, unfinished basements and outdoor outlets. Exact requirements depend on local code and when the home was built or updated.

One GFCI outlet can also protect other standard outlets "downstream" on the same circuit. That is why a dead bathroom outlet sometimes comes back on after you reset a GFCI in another bathroom or the garage.

Common reasons a GFCI trips

1. Moisture. Water in an outdoor outlet box, a damp bathroom or condensation can cause leakage that trips the GFCI.
2. A faulty appliance or tool. Damaged cords, worn insulation or internal faults in hair dryers, power tools or older appliances can leak current.
3. Too many devices downstream. Many small leakages from several devices can add up.
4. Wiring problems. Loose connections, damaged wires or a shared neutral can cause nuisance tripping.
5. An aging GFCI. GFCI devices can wear out over time and become overly sensitive or stop protecting at all.
6. Motor-driven equipment. Some refrigerators, freezers and pumps can trip GFCIs, especially older units.

Simple troubleshooting steps

You can narrow things down safely:

• Unplug everything on the GFCI and any outlets it protects, then press reset.
• Plug devices back in one at a time. If the GFCI trips when a specific device is connected, that device is the likely problem.
• Check for moisture. Look at outdoor covers and bathroom outlets for water or condensation. Let damp outlets dry before resetting.
• Look for the "parent" GFCI. If an outlet is dead and has no buttons, check GFCIs in nearby rooms, the garage or outside.

If the GFCI trips immediately with nothing plugged in, or will not reset at all, call a licensed electrician.

Test your GFCIs regularly

Many manufacturers recommend testing GFCIs monthly. Press "test," confirm power is off, then press "reset." If power does not shut off when you press test, the GFCI is not protecting you and should be replaced.

When to call a professional

Contact a licensed electrician if:

• The outlet is warm, discolored or smells like burning.
• Tripping happens repeatedly without a clear cause.
• The GFCI will not reset.
• You see scorch marks or hear buzzing.
• You are not comfortable working with electrical devices.

Electrical work can be dangerous. Turn off power at the breaker before any hands-on work, and leave wiring repairs to a pro.

How home warranties treat electrical issues

Many home warranty plans include electrical system coverage, which may cover outlets, switches, wiring and panels inside the home. Coverage varies, and common exclusions include code upgrades, damage from power surges and outdoor wiring in some plans. If a GFCI keeps tripping because of a faulty appliance, the appliance itself may be covered under a separate category, such as the refrigerator.

Our covered items page explains how plans commonly group electrical components.

How Warranty Wizards can help

We help you compare home warranty plans from third-party providers and explain what electrical coverage includes before you buy. Request a free quote at /get-a-quote/.