Why does my breaker keep tripping?
Updated August 2026
A breaker that trips again and again is most often a circuit overload, too many amp-hungry devices sharing one 15- or 20-amp circuit, which trips after a delay once the sustained current passes the breaker's rating. Move a space heater, hair dryer, or microwave to a different circuit and the trips usually stop. If it trips with almost nothing running, or trips the instant you reset it, work down the list below: that pattern points at a fault, not a load.
Safety first: repeated tripping means the breaker is doing exactly the job it was made for. Never quiet it by dropping in a higher-amp breaker: the wire behind the wall is sized for 15 or 20 amps, and forcing more current through it is how fires start inside a wall. If a breaker trips the instant you flip it back on, or trips with almost nothing plugged in, stop resetting it and call a licensed electrician.
Causes, most likely first
| Cause | How likely | The fix | Typical cost |
|---|---|---|---|
| Circuit overload (too many devices) | Most common | Move high-draw appliances to other circuits so the load stays under the 15- or 20-amp rating. It trips a minute or two after the load comes on. | Free |
| Short circuit or ground fault | Common | Trips instantly on reset. Unplug everything, then have an electrician trace the damaged wire, cord, or outlet behind it. | $100–400 |
| Failing or weak breaker | Occasional | Years of tripping wear the mechanism so it trips below its rating. A pro tests it and swaps the breaker. | $150–300 installed |
| Arc fault (AFCI-protected circuit) | Occasional | On newer AFCI-protected circuits, the breaker trips on arcing from a nicked wire or a noisy motor. A pro finds the arc or replaces a nuisance breaker. | $40–250 |
| Loose or shared neutral | Rare | A loose neutral on a multi-wire circuit trips the breaker intermittently. An electrician retorques and separates the shared neutral. | $150–350 |
Check these first
- Note what was running when it tripped. A space heater, microwave, and toaster sharing one kitchen circuit is a classic overload.
- Switch off or unplug everything on the dead circuit, reset the breaker, then add loads back one at a time to find the culprit.
- Feel the timing: a trip after a delay under load points to an overload, while an instant trip on reset points to a short or ground fault.
- Look and sniff for a scorched smell, a warm outlet, or a damaged cord on that circuit before you reset again.
- Check whether it is an AFCI or GFCI breaker (a test button on the breaker itself); those trip on faults a standard breaker ignores.
Prevent it next time
Spread heavy loads so no single 15- or 20-amp circuit carries a space heater plus another big draw, and test your breakers on the yearly schedule so a weak one shows itself before it strands you. Breakers are not forever: most run 30 to 40 years, and one that trips a little more each season is telling you it is near the end. The real cost of ignoring chronic trips is a charred bus bar or a fire, well past the $150–300 a swap runs.
When to call a pro
Call an electrician when the breaker trips instantly on reset, trips with the circuit nearly empty, or feels warm to the touch. Those point to a fault in the wiring, not your toaster. A diagnostic visit runs $100–200, tracing and repairing a short is $150–400, and a breaker swap is $150–300. If you find yourself resetting the same breaker daily, that is the moment to stop flipping it and get it looked at.
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Stop chasing symptoms, free for 30 daysFrequently asked questions
Is it safe to keep resetting a breaker that trips?
Once or twice to find an overload, yes. But if it trips right back the moment you flip it on, stop. An instant re-trip means a real short or ground fault, and repeated arcing at the breaker can pit the contacts and heat the bus bar. Sort the difference by timing: an overload trips after a delay under load, while a breaker that trips right after reset is a fault to trace, not a switch to fight.
Can I put in a bigger breaker to stop the tripping?
No, and it is dangerous. The breaker is matched to the wire gauge: 15 amps for 14-gauge, 20 amps for 12-gauge. Swap a 15 for a 20 and the wire can overheat long before the breaker ever trips, which is a fire hazard inside the wall. The correct fix is to reduce the load on the circuit or add a new circuit, never to raise the breaker's amp rating past what the wire can carry.
Why does my breaker only trip when I run the microwave and toaster together?
That is a textbook overload. A 15-amp circuit carries about 1,800 watts and a 20-amp about 2,400. A microwave near 1,200 watts plus a toaster near 1,000 blows past 1,800, so the breaker cuts power to protect the wire. Move one appliance to a different circuit, or have an electrician add a dedicated 20-amp kitchen circuit for roughly $250–600. Running both on one small circuit will trip it every time.
What's the difference between a breaker tripping and a GFCI tripping?
A standard breaker trips on overload or short circuit to protect the wiring. A GFCI trips on a tiny current leak to ground, a matter of milliamps, to protect you from shock. If an outlet loses power but the panel breaker looks fine, you likely have a tripped GFCI upstream instead. They are separate protections, and the same circuit often carries both. Check the outlets for a popped GFCI reset button before you blame the panel.