Why Your Breaker Keeps Tripping
A trip means the breaker did its job. When the same one trips again and again, it is pointing at too much load, a wiring fault or a worn breaker.
Take a breaker that trips whenever the microwave and the toaster run together. A 20-amp kitchen circuit carries about 2,400 watts, and each of those appliances can draw well over 1,000. Together they pass the limit. Many older Cleveland kitchens run every counter outlet on one circuit, where current code calls for at least two.
Lights that flicker when the dryer starts point somewhere else. A brief dip as a big motor starts can be normal; lights that flicker hard, or brighten while others dim, can mean a loose neutral or a weak service connection, and need an electrician promptly.
Breaker Trip Troubleshooter
Pick what happens, where and when. The answer lists likely causes, a safe check and when to call.
Pick what happens, where and when, then press Show Likely Causes.
Resetting a Tripped Breaker Safely
- Look and smell before you touch the panel. Heat, a burning smell, scorch marks or buzzing there mean leave it alone and call.
- Keep your hands dry. If water has pooled near the panel, as it can in a damp basement, stay away and call.
- Unplug or switch off what was running on that circuit when it tripped.
- Find the tripped breaker: its handle rests between ON and OFF, or at OFF, and some show a colored flag.
- Push the handle firmly to OFF until it clicks, then back to ON, standing to the side and looking away.
- If it holds, plug things back in one at a time. Whatever trips it again is your answer.
- If it trips again with everything unplugged, leave it off. One or two resets is the limit.
Causes Behind Repeat Trips
The causes overlap: a loose wire can heat a breaker until it trips on an ordinary load, and an overloaded circuit cooks the connections along it.
| Cause | How it shows up | What you can check | When to call an electrician |
|---|---|---|---|
| Overload | Trips after seconds or minutes with certain things running together | Add up what was on; move one appliance to another circuit | When everyday use trips it: the circuit needs less on it or a new circuit |
| Short circuit | Trips the moment it is reset, sometimes with a pop or a black mark | Unplug everything on the circuit, then reset once | Right away if it trips with everything unplugged |
| Ground fault | A GFCI trips, often near water or outdoors, more in wet weather | Unplug what is on it and the outlets after it | When it trips with nothing plugged in, or after every rain |
| Arc fault | An AFCI trips when a cord moves or a plug wiggles | Look for damaged cords and loose plugs | When it repeats with no damage in sight |
| Loose connection | Random trips, flicker, a warm cover plate or breaker, a faint burning smell | Only note it, and switch the breaker off | Promptly: heat at a connection is a fire risk |
| Worn breaker | Trips on loads it used to carry, runs warm or will not reset firmly | Note its label; do not swap it yourself | When an older breaker trips on ordinary loads |
A breaker and the wire on it fail together. When a breaker keeps tripping, Terry Ramos always checks for a loose or scorched wire at the breaker terminal before he replaces anything. A wire heating under its screw can trip a sound breaker, and a new breaker on a scorched wire soon fails the same way. Tracing faults like that is the core of electrical repair.
Resets, GFCIs, AFCIs and Breaker Sizes
Is it safe to keep resetting a breaker that trips?
Once or twice, to see whether it holds, if there is no heat, smell or noise at the panel. Past that, each reset sends current back into the fault, and a short or a burned connection gets worse with every try.
What is the difference between a GFCI and an AFCI?
A GFCI protects people from shock: it cuts power when a few thousandths of an amp leak away, such as through a person. An AFCI protects against fire by sensing the pattern of arcing in damaged cords and loose connections. A GFCI outlet resets with its RESET button; an AFCI breaker resets like any breaker.
Why does an AFCI breaker trip when the vacuum runs?
Some motors, older vacuums among them, spark inside in a way an AFCI can read as arcing. Try the vacuum on another circuit: if the trips follow it, it is the appliance; if they stay with the circuit, the circuit needs a look.
Can I replace a 15-amp breaker that keeps tripping with a 20-amp one?
No. A breaker is sized for the wire it protects. Most 15-amp circuits run on 14-gauge wire, which overheats at 20 amps long before a larger breaker would trip. The answer is less on the circuit, or a new one.
What Not to Try at the Panel
Some quick fixes at the panel are the dangerous ones. Leave these alone:
- Taking off the panel’s inner cover: the bars and incoming wires behind it stay live with the main breaker off.
- Putting in a larger breaker, or a larger fuse in a fuse box, to stop the trips.
- Holding, taping or wedging a breaker handle in the ON position.
- Resetting a breaker that is hot, smells burned, buzzes or shows scorch marks.
- Fitting a breaker the panel was not made for, even if it snaps in.
- Running an extension cord from another circuit around the one that trips.