Why does my GFCI outlet keep killing power and refusing to reset?

Start here: what this guide covers

A GFCI that suddenly won't reset is telling you one of three things: no power is reaching it, it's sensing current leaking to ground on the circuit it protects, or its own internal self-test has failed and it locked out on purpose.

This page covers three symptoms that share those same causes. The reset button that pops right back out. The GFCI that trips at random, sometimes days apart, with nothing obviously plugged in. And the one where outlets further down the circuit are dead while the GFCI itself looks completely normal.

They read like three separate problems in a search bar. In the field they're the same short list of faults showing up at different stages: a leak the device catches every time, a leak it catches intermittently, and a device whose internal contacts have given up.

If you arrived here for any of those, you're in the right guide. Each one has its own section below with the specific checks that separate it from the others.

What the GFCI is actually measuring

A GFCI compares current going out on the hot against current returning on the neutral. When those differ by about 5 milliamps, it opens. That's roughly 1/3000th of what a 15-amp breaker cares about.

So a GFCI trip and a breaker trip mean totally different things. A breaker sees too much total current. A GFCI sees current going somewhere other than back through the neutral, which usually means through water, through damp insulation, or through a person.

That sensitivity is why small, boring problems set it off. A corroded heating element leaking 6 milliamps is invisible to everything else in the house.

It also explains cumulative nuisance trips. Every switch-mode power supply on a circuit leaks a fraction of a milliamp by design. Load up a long garage circuit with LED drivers, a treadmill, a battery charger, and a beer fridge, and the baseline creeps toward the trip threshold. Then one motor start pushes it over.

Presentation 1: the reset button won't hold

You push reset, it clicks, and it pops back out immediately. Or it never clicks at all and feels mushy.

The pops-back-out version means the device is powered and actively seeing a fault. Work the load side: unplug everything, then try again. If it holds with nothing connected, you've narrowed it to a plug-in appliance and the rest is elimination.

The no-click version usually means no power at the line terminals. Cycle the breaker fully off and on, since a partially tripped breaker looks on but delivers nothing. If the breaker's fine, an upstream connection has failed, often a backstabbed receptacle earlier in the run.

There's a third version that fools people constantly. It won't reset, nothing is plugged in, the breaker is solid, and the device is 8 years old. That's a self-test lockout, and the fix is a new receptacle.

• Clicks and pops out immediately: real fault on the load side
• No click, no resistance: no voltage at the line terminals
• Won't reset with zero load, device 2015 or newer: self-test lockout
• Resets fine but the TEST button does nothing: internal sensing has failed

Presentation 2: random trips days apart with nothing plugged in

This is the most frustrating version because there's nothing to test when you're standing there. The circuit works perfectly, until it doesn't, three days later.

First correction: "nothing plugged in" almost never means nothing connected. GFCI receptacles feed hardwired loads all the time. Bathroom exhaust fans, garage door openers, disposals, outdoor post lights, low-voltage transformers, and heat tape are all on load-side wiring with no visible plug.

The single most common cause techs find is a refrigerator or garage freezer with a corroded defrost heater. Defrost runs 15 to 25 minutes every 8 to 12 hours. The leakage only exists during that window, so the trips look scattered across the week with no pattern.

Water on a schedule is the second. Sprinkler zones, heavy morning dew, and rain events all soak the same failed gasket or nicked buried cable. Match your trip times against your irrigation controller and the pattern usually appears in a week.

Motor starting current is the third. An aging pool pump, well pump, or shop compressor can leak briefly at startup through degraded winding insulation, and only when it's hot or humid.

The diagnostic tool here is a notepad, not a meter. Write down the date, time, and weather every time it trips. Three data points will usually point straight at the load.

Presentation 3: downstream outlets dead, GFCI looks fine

The GFCI face has power. The reset button sits flush. A plug-in tester at the GFCI shows correct wiring. And every outlet past it is dead.

This throws people because a normal-looking GFCI feels like it can't be the problem. It usually is. The load-side contacts inside the device carry every amp used by every outlet downstream, and after 10 or 15 years those contacts can burn open while the line side keeps working fine.

The other cause is mechanical: a load terminal screw that backed off, or load wires pushed into the backstab holes instead of clamped under screws. Backstab connections rely on a small spring, and heat cycling relaxes it. Downstream drops out and nothing looks wrong from the front.

Keep the plate in place. A licensed electrician will pull and inspect the device for cracks, burn marks, or heat damage.

One more possibility worth ruling out: the downstream outlets may not be on the GFCI at all. Before you replace anything, check whether a second breaker or a different GFCI upstream feeds that group.

• Voltage on line, none on load with reset pressed in: replace the device
• Voltage on both but downstream still dead: the break is in the wiring between boxes
• Load wires backstabbed: move them to the screw terminals and torque them down
• Blackened or melted terminal: heat damage, call an electrician

Why the year on the device matters so much

UL 943 changed in June 2015. GFCIs made after that date test themselves automatically and, when the test fails, deny reset instead of continuing to sit there looking functional. Older devices would happily reset while protecting nothing, which is exactly why the standard changed.

Practical effect: if your device is stamped 2016 through 2019 and it suddenly refuses to reset with the circuit stripped bare, the device is the most likely answer. Replace it before you go opening boxes.

The date stamp is molded or printed on the back of the yoke or the side of the body. You'll need to pull it out of the box to read it, breaker off.

House age matters too. Homes wired before the mid-1970s often have one GFCI added at the front of a long, ungrounded circuit, protecting a whole string of two-prong outlets. Those setups trip more, and a single failure kills a lot of the house.

Homes built after 2020 usually have GFCI breakers in the panel instead of receptacles for many circuits, thanks to expanded NEC requirements. If you can't find a GFCI receptacle anywhere, check the panel for a breaker with its own test button.

What this costs in 2026

The device is $22 to $30 for a standard 15A or 20A tamper-resistant unit, $32 to $45 for weather-resistant outdoor rated. Add $12 to $18 for a plug-in GFCI tester if you don't own one, and it pays for itself the first time.

A licensed electrician on a diagnostic call runs $120–$350 typical. That's a $125 to $190 minimum service call plus $95 to $165 per hour of troubleshooting, plus parts. Straightforward device swaps land at the low end; chasing an intermittent moisture fault across a buried outdoor run lands at the high end or above it.

GFCI breakers cost more. Expect $55 to $110 for the breaker itself depending on panel brand, and $200 to $375 installed. Some panel brands cost noticeably more, and obsolete panels can make the part a small scavenger hunt.

Insulation resistance testing, the megohmmeter work that finds a damaged buried cable, is usually billed as an additional hour. Budget $110 to $200 for it.

Repairing damaged direct-burial cable is the expensive tail on this. Trenching, splicing, and restoring landscape can push $600 to $2,200 depending on run length and what's on top of it.

When to call a licensed pro

There is no do-it-yourself path we recommend for this repair. The safe and lasting fix comes from a licensed pro who can diagnose the true cause and complete the work correctly.

Booking a qualified tech protects your safety, your warranty, and your home. Call a licensed professional to handle it end to end.

Can this wait?

The GFCI in a tripped state is the safe state. What makes this urgent is what's sitting dead behind it and what the fault might be doing.

Same day if a sump pump, well pump, freezer, medical device, or the only refrigerator is on the affected circuit. Get critical loads onto a known-good circuit with a properly rated extension cord as a stopgap.

Same day if there's any heat, smell, or discoloration at the device. That's not a GFCI problem, that's a connection problem, and connections that make heat make fires.

Within a few days for a garage or exterior circuit that trips after rain. It's not going to get better, and corrosion spreads through the terminals while you wait.

A week or two is defensible for a single dead bathroom outlet with nothing critical on it, as long as you're not resetting it repeatedly to force it back on. Forcing resets against a real fault can weld the internal contacts.

Weather patterns that explain the timing

GFCI complaints spike twice a year in most of the country. Late spring when irrigation systems come back online, and late fall when outdoor holiday lighting goes up.

Humid climates along the Gulf and Southeast see faster device failure. Heat plus moisture is hard on the sensing electronics, and I regularly replace 6-year-old garage GFCIs in Houston that would have gone 12 years in Denver.

Coastal salt air is worse. Within a mile of ocean, plan on 5 to 8 years for exterior devices and check them every spring.

Cold climates get a winter version: heat tape and roof de-icing cable. The jacket gets nicked or degrades, leakage climbs, and the GFCI starts tripping only during cold snaps when the thermostat energizes it.

Freeze and thaw cycles also crack outdoor box gaskets. Water gets in during the first warm rain of spring, which is exactly when a lot of these calls come in.

Where this fits with related problems

If your GFCI does reset but trips again within minutes under load, that's a live fault you can actually chase in real time. Look at our GFCI keeps tripping guide for the load-isolation sequence.

If an outlet is dead and there's no GFCI anywhere in the picture, that's usually a failed backstab connection or a half-tripped breaker. Different diagnostic path, same tools.

If a breaker in the panel is the thing tripping rather than a receptacle, check whether it's a GFCI or AFCI breaker. AFCI trips have their own pattern, often triggered by motor brushes and cheap dimmers.

If multiple circuits behave oddly at once, or lights brighten and dim as loads switch, stop troubleshooting outlets. That's a service neutral issue and it's a utility or electrician call, not a receptacle problem.

How we put this together

The diagnostic sequence here reflects how residential service techs actually order these calls: eliminate loads, verify supply, then suspect the device, then suspect the wiring. That order exists because it resolves the majority of calls before anyone opens a wall.

Cost ranges reflect 2026 US residential pricing, blending big-box device pricing with typical independent electrician service call and hourly rates. Metro labor rates run higher than the ranges shown, sometimes 30 to 50 percent higher in coastal cities.

Code references are to the National Electrical Code and UL 943, including the June 2015 self-test requirement that changed how end-of-life GFCIs behave. Your local jurisdiction may be on an older code cycle.

Nothing here replaces an inspection by a licensed electrician. If a step tells you to stop, that's a real stop, and it's there because the next move requires test equipment and training.