Quick answer
A breaker that trips repeatedly signals one of three issues: overload (too many appliances drawing power at once), short circuit or ground fault (wiring fault — dangerous), or a worn-out breaker. Diagnose by unplugging everything on the circuit and resetting. If it holds empty, add loads back one at a time. If it trips with nothing plugged in, or trips instantly when reset, kill power and call an electrician — do not repeatedly reset a tripping breaker.
Key facts
| Common causes | Circuit overload (too many amps); Short circuit; Ground fault; Failed breaker |
|---|---|
| DIY difficulty | Moderate |
| Time to fix | 15 min |
| Parts cost | $0–$40 parts |
| Tools needed | Non-contact voltage tester, screwdriver |
| When to call a pro | Immediate re-trip · burning smell · breaker won't reset |
What's happening
Breakers protect wiring from overheating. A 15-amp breaker trips when current exceeds 15 amps for more than a few seconds (thermal trip), or trips instantly if a short circuit sends hundreds of amps through it (magnetic trip). Repeated trips mean the circuit is genuinely being overloaded or there's a wiring fault. Continuing to reset a tripping breaker without addressing the cause is a fire hazard — the breaker exists to prevent exactly that outcome.
Common causes (ranked by frequency)
- Circuit overload (too many amps) 50% of cases
Kitchen: microwave + toaster + coffee maker on same 15-amp circuit. Bathroom: hair dryer + space heater. Total load exceeds breaker rating. Move some loads to a different circuit.
- Short circuit 20%
Hot wire touching neutral or hot touching hot. Massive current flow, breaker trips instantly. Common cause: damaged appliance cord, damaged wire in the wall. Dangerous — needs electrician.
- Ground fault 15%
Hot wire touching a grounded surface (metal box, water pipe, appliance chassis). Similar to short but usually less severe. If breaker is an AFCI/GFCI combo, this trips it. Needs electrician.
- Failed breaker 10%
Breakers wear out over 25–40 years. If trips occur with normal loads that used to be fine and no wiring changes have happened, the breaker itself may be failing. $10–$40 replacement — but panel work is licensed electrician territory.
- Loose neutral in panel 5%
Rare but serious. Loose connections at the panel or downstream cause resistance heating and intermittent trips. Requires an electrician.
How to diagnose
- Note the pattern. Trips when specific appliance turns on = overload from that appliance. Trips randomly = wiring or breaker issue.
- Unplug everything on the circuit. Reset the breaker. Does it hold?
- If it holds empty: plug items back one at a time. The load that trips it either draws too much or is faulty.
- If it trips immediately when reset with nothing plugged in: hard short or ground fault in the wiring. DO NOT keep resetting. Call an electrician.
- If the breaker feels hot to the touch or you smell burning at the panel: kill main power and call an electrician immediately.
The fixes
Fix #1 — Reduce the load on the circuit For overload
The most common cause has the simplest fix — don't run too many amps on one circuit.
Tools
Materials
- Optional: heavy-duty extension cord to route load to another circuit
- Identify high-wattage loads: hair dryers (1500W), space heaters (1500W), microwaves (1000–1500W), toasters (900W), coffee makers (800–1200W).
- Do the math: Watts ÷ 120 = amps. 15-amp circuit safely handles about 12 amps continuous (1440 watts).
- Move loads to different circuits. Plug the space heater into a bedroom outlet on a different circuit than the office computer.
- If you can't relocate loads, a dedicated circuit for the high-wattage device is the permanent fix — call an electrician to install.
Fix #2 — Find and remove the faulty load
If the breaker trips even with 'normal' loads, one appliance may be drawing more than its rating due to internal failure.
Tools
Materials
- Unplug everything on the circuit.
- Reset breaker. Wait 30 seconds. Plug loads back one at a time.
- Whichever load trips the breaker is faulty. Common: old refrigerators with failing compressors, motors with worn bearings, hair dryers with shorted heating elements.
- Repair or replace the faulty appliance.
Prevention
Learn your circuit map — label the breakers accurately. Avoid running high-wattage appliances simultaneously on one circuit. In older homes with 60-amp service or heavily loaded panels, consider a panel upgrade — modern homes need 200-amp service.
When to call a pro
When to stop and call a pro
- Breaker trips immediately every time you reset, with nothing plugged in.
- Burning smell at the panel or from any outlet on the circuit.
- Breaker feels hot to touch, or discoloration on the breaker or adjacent breakers.
- The breaker won't stay in the reset position at all.
- You have an older Federal Pacific Stab-Lok, Zinsco, or Challenger panel — these have well-documented failure-to-trip issues; replacement recommended.
Electrician diagnostic for repeated tripping: $150–$350. Breaker replacement: $150–$250 including labor and standard breaker. Panel replacement if needed: $1,300–$3,000. Suspected fire-hazard panels (Federal Pacific, Zinsco) — replacement is strongly recommended.
Cost estimate
Cost estimate
Frequently asked questions
Technically yes, but we don't recommend it — the panel has live wiring even with the main breaker off (the service entrance is always live). This is one of the topics where we don't publish DIY instructions. Panel work should always be done by a licensed electrician.
Microwaves pull 12–15 amps during startup — the compressor motor spike. If the circuit is already loaded (fridge, coffee maker), the total exceeds the breaker rating. Solution: dedicated 20-amp circuit for the microwave, or don't run other high-loads simultaneously.
Yes. Federal Pacific Stab-Lok panels have well-documented failure-to-trip issues — the breakers may not trip under overload, creating fire risk. Zinsco and Challenger panels have similar issues. Replacement is the standard recommendation from most electricians and insurance underwriters.
Standard breakers last 25–40 years in normal use. GFCI/AFCI breakers with electronics inside typically last 10–15 years. If your panel is more than 40 years old, plan for replacement — regardless of specific breaker issues.