Quick answer: A breaker keeps tripping when a circuit is overloaded (too many things plugged in), has a short circuit, has a ground fault, or when an arc-fault (AFCI) or ground-fault (GFCI) breaker detects a problem. Unplug some devices, reset the breaker once and see if it holds. If it trips again right away, trips with nothing plugged in, or you notice burning smells, warm outlets or scorch marks, leave it off and call a licensed electrician.
A breaker that trips is your home’s electrical system protecting itself. It shuts off power before wiring overheats. So when a breaker keeps tripping, the fix is not to keep flipping it back on. The fix is to find out why it’s tripping.
Most of the time, the cause is simple: a space heater and a hair dryer on the same circuit, or a worn-out appliance. Sometimes it’s a warning of a wiring problem that needs a pro. This guide shows you how to tell the difference safely.
What a circuit breaker actually does
Each breaker in your panel protects one circuit, a group of outlets, lights or a single large appliance. The breaker is rated for a certain amount of current, usually 15 or 20 amps for everyday outlets and lights.
When the current goes above that rating, or when the breaker senses a dangerous fault, it trips and cuts the power. As the Electrical Safety Foundation International explains, breakers interrupt the flow of electricity to protect an overloaded circuit, and a breaker that trips frequently indicates a problem that should be inspected.
The 5 most common reasons a breaker keeps tripping
1. An overloaded circuit
This is the most common cause by far. Too many devices on one circuit draw more current than it’s rated for.
Clues: It trips when you run a specific combination of things, like a space heater plus a vacuum, or a microwave plus a toaster oven. It resets and holds once you unplug something.
Fix: Move high-wattage devices to different circuits. Space heaters, hair dryers, window AC units, microwaves, toaster ovens and vacuums are the usual suspects. If you’re constantly juggling plugs, an electrician can add a dedicated circuit.
2. A short circuit
A short circuit happens when a hot wire touches a neutral wire. The current spikes instantly and the breaker trips immediately.
Clues: The breaker trips the moment you reset it or the instant you turn something on. You may notice a burning smell, a pop or a dark mark on an outlet or plug.
Fix: Unplug everything on the circuit and reset. If it holds, plug devices back in one at a time. If one device trips it, that device has the short. If it trips with nothing plugged in, the short is in the wiring, an outlet or a switch. Call an electrician.
3. A ground fault
A ground fault happens when a hot wire touches a ground wire or a grounded surface, often because of moisture. GFCI breakers and outlets are designed to catch these and trip fast to prevent shocks.
Clues: It happens in kitchens, bathrooms, garages, laundry rooms or outdoors, especially after rain or when something wet is plugged in.
Fix: Unplug everything on the circuit and let any wet outlets dry out. Check outdoor outlets for missing or broken covers. If it keeps tripping, have an electrician test the circuit.
4. An arc fault (AFCI breaker)
Newer homes use arc-fault circuit interrupter (AFCI) breakers on many circuits. They detect arcing, the tiny sparks that happen when wires are loose, damaged or pinched, which can start fires.
Clues: The breaker has a colored test button, and it trips randomly or when certain devices run. Vacuums, treadmills and devices with motors can sometimes set them off.
Fix: Look for damaged cords, loose plugs and nails driven through walls where wires run. If an AFCI trips repeatedly with no clear cause, an electrician can test whether the breaker or the wiring is at fault. Don’t replace it with a standard breaker; AFCIs are required by code in many areas for a reason.
5. A worn-out breaker or panel problem
Breakers wear out, and some older panel brands have known reliability issues. A breaker that trips when the load is light, feels hot or looks scorched may be failing.
Clues: Nothing on the circuit seems to explain it. You notice heat, buzzing or a burning smell at the panel.
Fix: This one is for an electrician. Don’t open the panel cover yourself.
How to safely reset a tripped breaker
- Unplug or turn off the things you were using when it tripped.
- Open the panel door and find the breaker that’s out of line with the others. A tripped breaker usually sits in the middle position or shows orange or red in a small window.
- Push it firmly all the way to Off, then back to On. Many breakers won’t reset until you push them fully off first.
- Turn things back on one at a time and watch for which device, if any, trips it again.
Stand to the side of the panel, keep your hands dry and stand on a dry surface. If the breaker won’t stay on, or the panel feels warm, stop and call an electrician.
Map your circuits so it’s easier next time
Many panels have missing or wrong labels. Spend 20 minutes with a helper turning off one breaker at a time and noting which outlets and lights go dark. Write it on the panel door. Next time a breaker trips, you’ll know exactly what’s on that circuit, and an electrician will too.
Warning signs you need an electrician now
Turn the breaker off and call a licensed electrician if you notice any of these:
- A burning smell, smoke or scorch marks at an outlet, switch or the panel.
- Outlets or switch plates that feel warm.
- Buzzing or crackling sounds from the panel, outlets or walls.
- Lights that flicker or dim when appliances turn on.
- A breaker that trips with nothing plugged in.
- A breaker that won’t reset.
- Aluminum branch wiring, a fuse box or a panel that’s decades old.
These can signal loose connections or damaged wiring, the kind of problems that cause electrical fires.
What electricians typically do
A licensed electrician will test the circuit, check the breaker, inspect connections at outlets, switches and the panel, and measure the load on the circuit. Common fixes include replacing a faulty outlet or breaker, repairing a damaged wire, splitting an overloaded circuit, adding a dedicated circuit for an appliance, or upgrading an old panel.
Frequently asked questions
Why does my breaker keep tripping?
The usual causes are an overloaded circuit, a short circuit, a ground fault, an arc fault detected by an AFCI breaker, or a failing breaker. Unplug devices and reset once. If it keeps tripping, especially with nothing plugged in, call an electrician.
Is it dangerous if a breaker keeps tripping?
The breaker tripping is a safety feature working. The danger is the cause, which can be damaged wiring or a short circuit. Never tape a breaker on or replace it with a larger one. Find and fix the cause.
Can a bad breaker keep tripping?
Yes. Breakers can wear out and trip below their rated load. If the breaker is warm, buzzing or trips when little is running, have an electrician test and replace it if needed.
Why does my breaker trip when I use my space heater?
A space heater can draw most of a 15-amp circuit’s capacity on its own. Add anything else on the same circuit and it overloads. Plug the heater directly into a wall outlet on a circuit with little else running.
Why does my breaker trip with nothing plugged in?
That points to a problem in the wiring itself, such as a short circuit, a ground fault or a failing breaker. Leave the breaker off and have a licensed electrician find the fault.
How many times can I reset a breaker?
Reset it once after unplugging devices. If it trips again right away, don’t keep resetting it. Repeated resets on a faulty circuit can damage the breaker and let a dangerous problem continue.
What’s the difference between a GFCI and an AFCI?
A GFCI protects people from shock by detecting current leaking to ground, and it’s common in kitchens, baths and outdoors. An AFCI protects against fires by detecting sparking from damaged or loose wires.
Can I replace a breaker myself?
It isn’t recommended. Parts inside the panel stay live even with the main breaker off, and the wrong breaker type or size creates a fire hazard. Hire a licensed electrician for any work inside the panel.
How much does it cost to fix a breaker that keeps tripping?
It depends on the cause. Moving appliances to other circuits costs nothing. Replacing a breaker or outlet is usually a short service call, while adding a circuit or upgrading a panel costs more. Get a quote after the electrician diagnoses the cause.
When should I upgrade my electrical panel?
Consider an upgrade if breakers trip often under normal use, the panel is decades old or a brand with known problems, you’re adding big loads like an EV charger or heat pump, or you still have a fuse box.
Get the tripping sorted out
If your breaker keeps tripping after you’ve spread out the load, or you’ve noticed any warning signs, it’s time for a licensed electrician. Find electricians near you on We Got Your Guys, check their reviews and licenses, and call them direct.