Why Your Circuit Breaker Keeps Tripping — Causes & Fixes

Why does my circuit breaker keep tripping and how do I fix it?

A breaker that keeps tripping is doing its job — it's cutting power to stop an overload, short circuit, or ground fault before it overheats wires or starts a fire. The goal is to find out whether you're simply asking one circuit to do too much, or whether there's a wiring fault that needs an electrician.

ℹ️ Reference only: For general reference only. This guide does not guarantee any result — every home is different. Verify against your local building codes and a licensed professional before acting, especially for electrical, gas, plumbing, structural, or roof work.

💵 DIY: $0 (resetting and rearranging loads). Electrician service call/diagnosis: ~$100–$250. Replacing a standard breaker: ~$150–$300 installed; AFCI/GFCI breaker: ~$200–$400. Repairing a faulty outlet/switch: ~$120–$300. Adding a new dedicated circuit: ~$300–$1,000+ depending on run length. Full panel replacement (if old/unsafe): ~$1,500–$4,500+. Costs vary widely by region. ⏱ 5–15 minutes to reset and test load; 30–60 minutes to isolate a faulty appliance. A pro diagnosis is typically 1–2 hours. ● Call a licensed pro

Safety: Resetting a breaker and unplugging appliances is safe for anyone. Never open the breaker panel cover or touch wiring inside it — the main service lugs and line-side conductors stay energized even with the main breaker off and can deliver a fatal shock or arc-flash burn. Stop immediately and call an electrician (or 911 if there's active danger) if you smell burning, see smoke or scorch marks, feel a warm or buzzing panel, or a breaker trips repeatedly with nothing plugged in — these signal a short or arcing fault that can cause a fire. Never wire around a tripping breaker or install a higher-amperage breaker than the circuit is rated for.

Common causes

Circuit overload — too many devices (especially space heaters, hair dryers, microwaves, window AC) drawing more amps than the breaker's rating (usually 15A or 20A) on one circuit at the same time. (most common)
Quick check: Note what was running when it tripped. If unplugging a high-draw appliance lets the breaker stay on, it's an overload.
A specific faulty appliance or cord — a failing motor, frayed cord, or shorted device trips the breaker the moment it's plugged in or turned on. (common)
Quick check: Unplug everything on that circuit, reset the breaker. Plug devices back in one at a time; the one that trips it is the culprit.
Short circuit — a hot wire touching a neutral or ground, often in a worn outlet, switch, or damaged cable. Usually trips instantly and hard, sometimes with a pop, scorch mark, or burning smell. (common)
Quick check: Look and smell for scorched outlets or switches. A burning smell, browning, or buzzing means stop and call a pro now.
Ground fault or arc fault on a GFCI/AFCI device — moisture or small leakage current (GFCI), or arcing/damaged wiring (AFCI) trips these more sensitive protective devices. GFCIs are common in bathrooms, kitchens, garages, basements, and outdoors. (common)
Quick check: If it's a bathroom, kitchen, garage, or outdoor outlet, check for moisture and test/reset the GFCI. Note: nuisance AFCI trips can also be caused by certain electronics, not just a fault.
Worn-out or weak breaker — older breakers can occasionally trip below their rating. Some legacy panels (e.g., Federal Pacific Stab-Lok, Zinsco) have a documented history of breakers that fail to trip when they should — a fire hazard that warrants evaluation regardless of nuisance tripping. (less common)
Quick check: If one breaker trips with little load while others don't, or your panel is one of the known problem brands, have an electrician evaluate it.
Loose or corroded wiring connection — a loose wire at the breaker, outlet, or splice causes arcing and heat that can trip the breaker (especially AFCI) and is a real fire risk. (less common)
Quick check: Flickering lights, a burning smell, or warm/discolored outlet plates on that circuit point to a loose connection — pro territory, leave it off.

How to fix it

First, identify the circuit: at the panel, find the breaker that is not fully ON — a tripped breaker usually sits in a middle position or moves toward OFF.
Reduce the load. Unplug high-wattage items (space heaters, hair dryers, microwaves, irons) from that circuit, and avoid running several of them at once on the same circuit.
Reset the breaker correctly: push it firmly all the way to OFF first, then back to ON. A breaker often won't reset from the tripped middle position if you only push toward ON.
Isolate a bad appliance: unplug everything on the circuit, reset, then add devices back one at a time until it trips again — that device or its cord is likely faulty and should be repaired or replaced (don't keep using a cord or appliance that trips the breaker).
For GFCI/AFCI circuits in wet areas, check for moisture, let the outlet dry, and press RESET on the outlet or breaker. If it trips again right away, stop and call an electrician.
Spread the load: move power-hungry appliances to outlets on different circuits so no single 15A/20A circuit is maxed out. If you constantly need more capacity, have an electrician add a dedicated circuit.
If the breaker trips immediately with nothing plugged in, trips with very light load, won't reset at all, or you see/smell scorching or feel a warm or buzzing panel — leave it OFF and call a licensed electrician. That points to a short, ground/arc fault, or failing breaker/wiring, not a simple overload.
Do NOT replace a breaker with a higher-amp one to stop the tripping — the wire is sized for the original amperage, and a bigger breaker lets the wire overheat and can start a fire. Never bypass, jumper, or wedge a breaker.

DIY or call a pro?

DIY is fine for the diagnostic basics that don't require opening the panel: finding the tripped breaker, reducing load, resetting it, and isolating a faulty appliance by plugging things in one at a time. Call a licensed electrician for anything inside the panel (replacing or tightening a breaker, any internal wiring), any short or ground/arc fault you can't trace to a single device, burning smells, scorch marks, a warm or buzzing panel, breakers that trip with no load or won't reset, recurring AFCI/GFCI trips, or a known problem panel (Federal Pacific Stab-Lok, Zinsco). Opening a live panel exposes you to lethal shock and arc-flash — the main lugs and line side stay energized even with the main breaker off.

Tools & parts

Flashlight or phone light (to read the panel)
Notepad or phone to track which appliances were running
GFCI outlet tester (optional, ~$10–$20)
List of which breaker controls which circuit (label your panel if it isn't already)

Keep a record of every fix you make — what broke, what it cost, how you solved it.

Track your home's fixes in Home Story →

Based on: Building/electrical code norms (National Electrical Code, NEC); Manufacturer guidance (breaker and panel makers, e.g., Square D, Eaton); Reputable DIY references (This Old House, Family Handyman); Consumer electrical-safety guidance (ESFI-style public safety education)

This is general home-maintenance information, not professional electrical advice. Electrical work can be dangerous and is governed by local codes and permits. When in doubt, hire a licensed electrician. Verify any guidance against your specific equipment and local regulations.