Breaker Keeps Tripping? Causes, Fixes & When to Call
A circuit breaker that trips once is an event; one that keeps tripping is a message. It is interrupting power because something downstream (an overloaded circuit, a short, a ground fault, or the breaker itself) is outside safe limits. Here is how to narrow it down without opening anything, and when it stops being a homeowner job.
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A local licensed electrician can usually tell you over the phone whether it needs a visit.
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- !Burning smell, scorch marks, or melted plastic anywhere near the panel or an outlet
- !The breaker trips instantly every time you reset it, with everything on the circuit unplugged
- !The breaker, panel, or any outlet is hot to the touch, buzzing, or crackling
- !You see sparks, smoke, or hear sizzling when the breaker trips
- !Your panel is a Federal Pacific (FPE Stab-Lok) or Zinsco; these have documented failure-to-trip histories
- ✓Unplug everything on the affected circuit, reset the breaker once, and reconnect devices one at a time. If it trips when a specific device joins, you found the culprit
- ✓Count what runs on the circuit at once: space heaters, hair dryers, microwaves, and window ACs each pull 1,000–1,800 W, and two on one 15 A circuit is a textbook overload
- ✓Check whether the tripping follows an appliance to a different outlet, which points at the device, not the wiring
- ✓Note when it trips: under load (overload), instantly on reset (short or breaker), or in damp conditions (ground fault on a GFCI/AFCI)
- ✓Take a photo of the breaker position and any label before calling; it makes the phone conversation faster
- →The breaker trips with nothing plugged in: the fault is in the wiring, a junction, or the breaker itself
- →It trips repeatedly under normal, light use and the load test points to nothing
- →The same breaker has been "fixed" by resetting for weeks: repeated nuisance tripping ages the breaker and hides the real fault
- →Any AFCI or GFCI breaker that will not hold after resets: these detect arcing and leakage, not just overload
- →You need a new dedicated circuit because the load test shows the circuit is genuinely maxed out
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The four reasons a breaker keeps tripping
Overload is the common one: the circuit is asked for more current than its rating, heat builds in the wiring, and the breaker opens before the wire insulation cooks. It trips seconds to minutes after the load stacks up, say when the kettle joins the space heater, and holds fine once the load drops. The fix is moving loads or adding a dedicated circuit, not a bigger breaker.
A short circuit is hot touching neutral or ground: the breaker snaps instantly, usually with authority, and re-trips the moment you reset it the right way. Shorts live in damaged cords, chewed cable, failed devices, or loose connections in a box. This is the category where DIY probing goes wrong, because finding a short is electrician work.
A ground fault is current leaking somewhere it should not, such as moisture in an outdoor box or a failing appliance motor. GFCI breakers and outlets are designed to catch milliamp-level leaks, which is why a GFCI that keeps tripping in a bathroom, kitchen, garage, or outdoors usually means real leakage, not an oversensitive device.
And sometimes the breaker itself is done. Breakers are mechanical devices with springs and contacts; after years of heat cycles, or dozens of trips in a row, they weaken and trip below their rating. A licensed electrician confirms this with a clamp meter in minutes: if the circuit draws 9 A and the 15 A breaker still opens, the breaker is the fault, and a breaker replacement is the fix.
Why the answer is never a bigger breaker
The breaker rating protects the wire in the wall, not the devices plugged in. A 15 A breaker on 14-gauge copper is matched math: swap in a 20 A breaker and the wire becomes the fuse, overheating inside walls and ceilings long before the new breaker notices. Oversizing a breaker on existing wiring is one of the most common causes of electrical fires investigators find, and it is an instant code violation.
If a circuit genuinely needs more capacity, the correct fix is a new circuit on appropriately sized wire, typically $250 – $900 for a dedicated 20 A run, depending on distance and finish work.
What an electrician visit costs for this
Diagnosing a tripping breaker is usually a service-call-plus-first-hour job: $150 – $350 in most markets. From there, common outcomes price out as: breaker replacement $150 – $300; new dedicated 20 A circuit $250 – $900; locating and repairing a wiring fault $200 – $750 depending on access; GFCI/AFCI breaker replacement $200 – $400 (the devices themselves cost several times a standard breaker).
If the visit uncovers a panel-level problem (corroded bus bar, repeated nuisance trips across many circuits, a Federal Pacific or Zinsco panel) you are in panel replacement territory: $2,000 – $4,500 for a 200 A swap. That is a bigger conversation, but it is also the scenario where the tripping breaker just did you a favor.
AFCI and GFCI: the breakers that trip "for no reason"
Arc-fault (AFCI) breakers, required in bedrooms and living areas in modern code, listen for the electrical signature of arcing: damaged cable, loose terminations, failing cords. They also occasionally react to brushed-motor devices like vacuums and treadmills. If an AFCI holds with the suspect device unplugged and trips with it running on a different circuit too, the device is arcing; if the breaker trips regardless of load, take it seriously, because arcing in walls is exactly the fire precursor AFCIs exist to catch. The AFCI tripping guide walks through the isolation test step by step.
GFCI trips track moisture and leakage. Outdoor circuits after rain, a refrigerator on a garage GFCI, an aging pool pump: these are the classic repeat offenders. The pattern is diagnostic: note the conditions, and give that history to the electrician on the phone.
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