A GFCI outlet usually keeps tripping because it is detecting current leaking where it should not, which can come from moisture, a faulty appliance, a damaged cord or a wiring problem. Less often, the GFCI device itself is worn or failing, so repeated tripping does not automatically mean the outlet is bad.
Unlike a standard breaker that responds to overloads, a GFCI responds to small ground-fault currents, which is why the causes are different.
What a GFCI Is Detecting
A GFCI compares the current going out on a circuit with the current coming back. If they do not match, some current may be flowing through an unintended path, such as water, damaged insulation or a person. The GFCI cuts power to help prevent a shock.
Remember that a GFCI outlet can protect other outlets downstream on the same circuit. A problem in a bathroom, garage or outdoor outlet can trip a GFCI located in another room.
That is why it helps to know which outlets are on the same protected circuit. A tripped GFCI in a garage or basement can explain why a bathroom or exterior outlet has no power.
Moisture and Weather
Water is one of the most common triggers. Outdoor outlets without proper in-use covers, garage outlets near melting snow from a vehicle, and bathroom outlets exposed to steam or splashes can all trip a GFCI. In Utah, seasonal rain, snow and freeze-thaw cycles can let moisture into exterior boxes and covers.
If tripping happens mostly after storms or during wet weather, moisture may be part of the cause. Do not use an outlet that is wet or shows water inside the cover.
Connected Equipment, Wiring and the Device
Appliances with motors or heating elements, older tools, damaged extension cords and holiday lighting can leak small amounts of current and trip a GFCI. If tripping happens only when one device is plugged in, stop using that device until it is checked.
Wiring problems can also cause trips, including damaged insulation, loose connections or wiring errors downstream of the GFCI. Tracing these often calls for electrical troubleshooting. GFCI devices can also wear out, but replacing the outlet will not help if the cause is elsewhere.
When Repeated Tripping Needs Attention
Pressing reset once is a normal step. If the GFCI trips again right away or keeps tripping, leave it off and have it checked rather than resetting it over and over. Never bypass a GFCI or replace it with a standard outlet to stop the tripping, since that removes important shock protection. Write down when the trips happen and what was plugged in, since that pattern helps narrow down the cause.
If a GFCI in your Salt Lake City home keeps tripping, our GFCI outlet installation and service can find out whether the device, the circuit or connected equipment is the cause.