A GFCI outlet keeps tripping because it is detecting current leaking to ground, which can be caused by moisture, a faulty appliance, a damaged cord or a wiring problem. In some cases, the GFCI device itself is worn or failing.
Frequent tripping is a sign that something needs attention. It should not be ignored or worked around.
Moisture and Weather
Water is one of the most common causes. Outdoor outlets can collect moisture from rain, snow, sprinklers or condensation, especially if the cover is damaged or not rated for wet locations.
Outlets in bathrooms, basements and garages can be affected by humidity or leaks. If a GFCI trips after storms or when the weather changes, moisture may be involved.
Problems With Connected Devices
Appliances and tools can develop ground faults as they age. Damaged cords, worn motors and moisture inside equipment can all cause current to leak.
One way to narrow this down is to notice whether the GFCI trips only when a certain device is plugged in or running. If it does, that device may be the source. Stop using it until it has been checked or replaced.
Outlets downstream of the GFCI can matter too. A single GFCI may protect several outlets, so a device plugged in elsewhere in the room or even outside may cause the trip.
Wiring and Device Problems
If the GFCI trips with nothing plugged in, the problem may be in the wiring. Damaged insulation, loose connections or moisture in a box further down the circuit can cause a ground fault.
GFCI outlets can also wear out. An older GFCI may trip more easily or refuse to reset. Many newer models are designed to stop supplying power when they can no longer provide protection, which can look like a device that will not reset.
Wiring mistakes from past work can also cause repeated tripping.
What Not to Do and How the Cause Is Found
Never bypass or remove GFCI protection to stop the tripping. GFCIs are there to reduce shock risk, especially near water.
Do not keep resetting a GFCI that trips immediately. Repeated resets do not fix the cause. Do not open the outlet or work on the wiring yourself.
If the outlet is wet, warm, smells like burning or shows damage, stop using it and switch off the circuit at the panel if it is safe to reach.
An electrician can test the GFCI, the circuit and connected outlets to find where the fault is coming from. The fix may involve replacing the GFCI, repairing wiring, sealing an outdoor box or replacing a faulty appliance.
If a GFCI in your home keeps tripping, our GFCI outlet installation page explains how protected outlets are installed and replaced. Contact us with details about when it trips, and we can help you track down the cause.