You press the TEST button on a GFCI outlet and nothing happens. Or you reset it, and within a day it trips again for no clear reason. Those moments are the outlet telling you something — and ignoring them in a kitchen or bathroom is a real safety risk.
How a GFCI outlet works and why it wears out
A ground-fault circuit interrupter monitors the current flowing out through the hot wire and returning through the neutral. Under normal conditions those two values match. The moment they differ by about 5 milliamps — which can happen when current finds an unintended path through water, a faulty appliance, or a person — the outlet cuts power in under a tenth of a second.
That’s the protection. The catch is that the sensing circuit inside the outlet is mechanical and electronic. It degrades over time, especially in high-humidity environments like San Diego bathrooms, pool-adjacent patios, and coastal homes where salt air accelerates corrosion.
Most manufacturers rate GFCI outlets for around 10,000 test cycles and roughly 10-15 years of service life. Outlets installed during a kitchen remodel in the early 2010s are reaching that window now. The internal components can fail in two ways: they trip too easily (nuisance tripping), or they stop tripping when they should. That second failure mode is the dangerous one — the outlet looks normal and powers devices, but the ground-fault protection is gone.
San Diego’s coastal humidity, older wiring in neighborhoods like North Park and Hillcrest, and homes that were built before GFCI requirements were standardized all push outlets toward the shorter end of that lifespan.
Five signs your GFCI is failing
1. The TEST button doesn’t cut power. Press TEST. The outlet should go dead immediately. If connected devices stay on, the sensing mechanism has failed. Replace the outlet — don’t keep using it.
2. The RESET button won’t stay in. If the outlet trips again within seconds of resetting, either the outlet itself is defective or something on the downstream circuit is causing a real ground fault. You’ll need to sort out which one.
3. The outlet is visibly discolored or cracked. Yellowing is cosmetic aging. Scorch marks, burn smell, or a cracked face are not cosmetic — those point to heat damage or arcing inside the device. Stop using it immediately.
4. The outlet is more than 15 years old and has never been tested. No visible symptoms doesn’t mean it’s working. GFCI devices that have never been tested — common in homes where previous owners never knew to do it — may have failed silently. Test every GFCI in your home at least once a year.
5. Intermittent power on downstream outlets. A single GFCI outlet often protects several standard outlets wired “downstream” on the same circuit. If those outlets lose power randomly, the upstream GFCI may be nuisance-tripping due to age or wiring issues.
DIY test vs. when to call an electrician
Testing a GFCI yourself is straightforward. Plug a lamp or phone charger into the outlet. Press TEST — the device should lose power. Press RESET — it should come back. If both steps work cleanly, the outlet is functioning.
Replacing a GFCI yourself sits in a gray area. The wiring task is simpler than most electrical work: disconnect the old device, connect the new one to the LINE terminals, and optionally wire downstream outlets to the LOAD terminals. Many homeowners do this without incident.
But there are real reasons to call a licensed electrician for kitchen, bathroom, and exterior GFCI outlets specifically.
Kitchen and bathroom circuits frequently have multiple outlets downstream of a single GFCI. Wiring those LOAD terminals incorrectly means the protection doesn’t extend where code requires it. Exterior GFCI outlets in San Diego — particularly around pools, spas, and irrigation systems — are exposed to the kind of moisture that makes a wiring mistake consequential fast. And if the outlet keeps tripping after replacement, you’re likely dealing with a wiring fault or appliance issue that needs diagnosis, not just a new device. Our outlet and switch installation service covers both the swap and the diagnosis — so you’re not guessing.
If a tripping GFCI is part of a larger pattern of circuit problems, it’s worth reading about why a breaker keeps tripping before assuming the outlet is the only issue.
Replacement cost in San Diego homes
A GFCI outlet itself costs $15-$40 depending on amperage rating and whether it’s tamper-resistant (which is code-required in most new installations). The device cost is not where the money goes.
Labor in San Diego typically runs $100-$200 for a single GFCI outlet replacement when it’s a straightforward swap on an accessible circuit. That range moves up when an electrician needs to troubleshoot why the outlet keeps tripping, when the existing wiring needs to be re-terminated, or when the work is part of a larger project like a kitchen remodel or panel upgrade.
If you need multiple GFCI outlets replaced — say, three bathrooms and a garage — most electricians will bundle the work at a lower per-outlet rate. It’s worth asking.
Our dedicated post on GFCI outlet installation cost and requirements breaks down pricing by location type and goes into the permit requirements for new circuits. This post focuses on replacement of existing devices, which generally doesn’t require a permit in California, but check with your local jurisdiction if you’re unsure.
For a broader look at what electrical work costs in San Diego County, this electrician cost guide covers typical rates for common jobs.
Where code requires GFCI in 2026
The National Electrical Code (NEC/NFPA 70) has expanded GFCI requirements with each revision cycle. California adopted the 2023 NEC with local amendments. As of 2026, GFCI protection is required in:
- Bathrooms — all receptacles
- Kitchens — receptacles within 6 feet of a sink, and all countertop receptacles
- Garages — all 120V receptacles
- Outdoors — all exterior receptacles
- Crawl spaces and unfinished basements
- Laundry areas — receptacles within 6 feet of a sink
- Boathouses
- Pool, spa, and hot tub areas — within specified distances
Older homes in San Diego are commonly not up to current code in garages and exterior locations. If your home was built before 1975, you may have no GFCI protection at all in bathrooms. That’s a code violation if you’re doing permitted work, and it’s a safety issue regardless.
When you’re replacing a failed GFCI in any of these locations, you’re also obligated to bring the installation up to current code — which can mean adding tamper-resistant devices or ensuring the wiring supports proper LOAD-side protection downstream.
What to do if a whole circuit lost power
If pressing RESET doesn’t restore power, or if multiple outlets in different rooms suddenly stopped working, the problem probably isn’t just the GFCI device.
Work through this sequence:
- Check every GFCI in the house. One tripped GFCI in a garage or bathroom can kill power to a surprising number of outlets elsewhere. Look for any GFCI with a popped-out RESET button.
- Check the breaker panel. A tripped breaker sits between ON and OFF — it won’t be fully flipped to OFF unless it was turned off manually. Push it firmly to OFF then back to ON.
- Test the outlet with something simple. A lamp rules out a bad phone charger or appliance as the culprit.
- Look for a tripped AFCI breaker. Newer homes in San Diego have combination AFCI/GFCI breakers in bedrooms and living areas. These have a TEST button on the breaker itself and trip independently of the outlet.
If none of those steps restore power, you’re dealing with a wiring fault, a failed breaker, or a more complex circuit issue. That’s the point where DIY stops being appropriate.
When to call us
If your GFCI is in a kitchen, bathroom, or exterior location — or if it’s part of a circuit that’s losing power intermittently — a licensed electrician is the right call. These locations carry the highest risk, and a mis-wired GFCI outlet provides false security rather than real protection. Bright Pro Electric serves all of San Diego County and carries the licensing you can verify through the CSLB license lookup. Call us at (858) 925-5546 for a same-day estimate.