Why Does My Circuit Breaker Keep Tripping? 7 Causes & Fixes

Why Your Circuit Breaker Keeps Tripping

A circuit breaker keeps tripping because it senses a real fault on that circuit: an overload, a short circuit, a ground fault, or an arc fault. Overloaded circuits cause most repeat trips. Less often it is a failing appliance, a worn-out breaker, or loose wiring hidden behind the walls.

The breaker is not being oversensitive. It is sized to protect the wire it feeds, and every trip means the circuit is carrying more current than that wire can safely handle, or current is leaking where it should not.

The goal is to find the fault, not silence the breaker. Here are the seven most common causes, the checks you can safely do, and what the fix costs in 2026.

How Does a Circuit Breaker Decide When to Trip?

A standard breaker trips two different ways, and each points to a different problem.

A thermal trip uses a bimetal strip that bends under sustained overcurrent and releases in seconds to minutes, catching overloads. A magnetic trip uses an electromagnet that reacts to a sudden current spike and opens in a fraction of a second, catching short circuits.

Two specialty breakers add protection beyond that:

• GFCI breakers and outlets trip when a few milliamps leak to ground. NEC 210.8 requires them in bathrooms, kitchens, garages, laundry areas, basements, and outdoors.
• AFCI breakers detect the electrical signature of arcing from a loose or damaged connection. NEC 210.12 requires them on most living-area circuits, including bedrooms, living rooms, hallways, and kitchens.

The trip pattern is your first clue. Trips minutes into heavy use point to an overload, and an instant trip on reset points to a short. A GFCI popping in a wet spot means a ground fault, and an AFCI tripping in a living area means arcing. A trip tied to one appliance points to that appliance, while a trip with almost nothing running points to a worn breaker or hidden wiring fault.

The 7 Reasons a Circuit Breaker Keeps Tripping

1. Overloaded Circuit (The Most Common Cause)

An overloaded circuit is too many watts on one line. A 15-amp, 120-volt circuit carries 1,800 watts at most, and NEC 210.20(A) caps continuous loads (three hours or more) at 80 percent, about 1,440 watts. A 20-amp circuit tops out near 2,400 watts, with a continuous limit around 1,920 watts. One 1,500-watt space heater takes nearly the whole safe capacity of a 15-amp circuit by itself.

West Texas summers make it worse. When an AC compressor starts on a 105-degree afternoon it briefly draws five to eight times its running current, so a window unit, a refrigerator, and a few fans on the same branch will trip the breaker minutes into the heaviest load.

What to do: Unplug a few devices, spread high-draw appliances across different circuits, and reset the breaker once. If it holds, you found the cause. If it keeps tripping under normal use, the circuit is undersized for how you live, and a dedicated circuit is the real fix.

2. Short Circuit

A short circuit happens when a hot wire touches a neutral or another hot wire. Current spikes instantly and the magnetic trip snaps the breaker off in milliseconds.

Watch for a popping sound, scorch marks, or a burnt-plastic smell at an outlet or switch. This is the fault breakers exist to catch. Find and repair it, do not reset around it.

3. Ground Fault (GFCI Keeps Tripping)

A ground fault is a hot wire touching a grounded surface: a metal box, water, or damp material. GFCI devices trip on a leak of only a few milliamps to prevent shock, which is why they guard kitchens, bathrooms, garages, and outdoor receptacles.

Repeated GFCI trips usually mean moisture in an outdoor or garage receptacle, a failing appliance, or a GFCI at the end of its life.

One tripped GFCI can also cut power to every outlet wired downstream of it, which often looks like a mystery dead outlet.

4. Arc Fault (AFCI Keeps Tripping)

AFCI breakers listen for arcing: the small, hot sparks of a loose terminal, a nail driven through a cable, a chewed cord, or a backstabbed outlet working itself free.

They are sensitive by design because arcing inside walls is a leading cause of electrical fires. If one AFCI trips repeatedly, do not dismiss it as a false alarm. It is flagging a specific circuit that needs a pro.

5. A Failing Appliance or Device

Sometimes the circuit is healthy and one device is the problem: a motor with a shorting winding, a failing heating element, an aging well pump, or an AC compressor with a bad start capacitor. The tell is that the breaker only trips when that one device runs.

Quick test: Unplug everything on the circuit, reset the breaker, then reconnect devices one at a time. Whatever triggers the trip is your suspect. Repair or replace that device, not the breaker.

If a light acts up without tripping anything, that is a different failure mode, covered in the guide to an LED light not working but has power.

6. A Worn-Out Breaker

Breakers wear out. After years of heat cycling in a hot garage panel, or after many hard trips, the internal mechanism weakens and the breaker starts tripping below its rated load, sometimes with almost nothing running.

A breaker that feels loose, looks discolored, or will not stay on may simply be done. Because a hidden wiring fault causes the same symptom, test the circuit before swapping the breaker.

7. Loose or Damaged Wiring

Loose connections, rodent-chewed cable, a wire nicked by a drywall screw, or corroded terminals all raise resistance, and resistance makes heat. That heat trips breakers intermittently, and it is a genuine fire risk.

This fault lives inside walls and inside the panel, so it takes a licensed electrician with proper test equipment. If you smell burning, hear buzzing, or the panel cover feels warm, treat it as urgent and reach an emergency electrician in San Angelo instead of waiting for a regular appointment.

Once a trip traces back to wiring, a worn breaker, or anything inside the panel, it stops being a DIY job. Call (877) 473-1995 and we will connect you with a licensed local electrician in San Angelo who can test the circuit and find the real fault. No pressure and no obligation.

Do You Have a Federal Pacific or Zinsco Panel?

If your panel is labeled Federal Pacific Electric, Stab-Lok, or Zinsco, take breaker problems seriously, including the absence of trips.

Independent testing of FPE Stab-Lok breakers found high failure-to-trip rates under overload, with some studies reporting failures in a quarter or more of tested breakers. In 2005 a New Jersey court ruled that Federal Pacific had fraudulently labeled Stab-Lok breakers as meeting UL standards. Zinsco panels have a different flaw: breaker-to-bus-bar connections loosen over time, causing arcing and overheating behind the breaker.

The most dangerous failure in these panels is not nuisance tripping. It is the breaker that never trips at all while a wire overheats.

Both brands were installed widely from the 1950s through the 1980s, so plenty of older San Angelo homes still have them. If you own one, a modern electrical panel upgrade is the fix electricians consistently recommend, and some insurers now require it.

Can You Replace a 15-Amp Breaker With a 20-Amp Breaker?

No. Never upsize a breaker to stop the tripping. The breaker is matched to the wire it protects: 14-gauge copper is rated for 15 amps, 12-gauge for 20 amps.

Put a 20-amp breaker on 14-gauge wire and it will not react until current passes 20 amps, while the wire starts overheating above 15. Everything in that gap cooks the insulation inside your walls with no protection at all.

It is a direct NEC violation and one of the most common causes of preventable electrical fires. If a circuit genuinely needs more capacity, the safe answer is a new circuit with correctly sized wire.

What Does It Cost to Fix a Tripping Breaker in 2026?

Most tripping-breaker repairs are cheap compared with the damage they prevent. These ranges reflect national and Texas cost data as of 2026, with Texas labor landing near the middle.

• A basic diagnostic visit runs about $75 to $125.
• Tracing a stubborn fault across the circuit, outlets, and wiring runs $200 to $600.
• A standard breaker replacement, installed, runs $150 to $350.
• A panel replacement or upgrade runs $1,300 to $4,500.
• Replacing a Federal Pacific or Zinsco panel runs $1,500 to $4,000 or more.

Simple causes like a worn breaker or an overloaded circuit sit at the low end, and most fall under routine electrical repair and troubleshooting. Panel work costs more because it can involve service equipment, permits, and code upgrades.

What Can You Safely Check Yourself?

You can do a few things from outside the panel. Never remove the panel cover; the bus bars inside stay energized even with the main breaker off.

1. Reset the breaker once. Push it fully to OFF, then firmly to ON. If it trips again immediately, stop.
2. Note the pattern. Instant or delayed trip, and what was running at the time.
3. Reduce the load. Unplug high-draw devices and move them to other circuits.
4. Isolate the appliance. Reconnect devices one at a time to find the trigger.
5. Check GFCI outlets on the circuit and reset any that have popped.

When Should You Call an Electrician?

Call a licensed electrician when the breaker trips immediately after every reset, trips with nothing running, will not reset at all, or when you notice burning smells, scorch marks, buzzing, or a warm panel cover. Those point to a short, a ground fault, failing wiring, or a failing breaker, and none are reset-and-hope problems.

The Electrical Safety Foundation International lists frequent breaker trips among the key warning signs of an overloaded or faulty electrical system.

In Texas, work inside the panel is restricted to licensed electricians under TDLR rules, and many San Angelo repairs also require a city permit. Panel work done wrong stays hidden until it fails.

Talk to a Local San Angelo Electrician

A breaker that keeps tripping is your home asking for attention, and the fix is usually straightforward once the cause is found.

Call (877) 473-1995 and we will connect you with a licensed local electrician in San Angelo who can diagnose the circuit and fix the real problem. No pressure and no obligation.