1. Overload
Too many devices on one circuit — a space heater and a kettle on the same kitchen circuit, for example. The breaker trips after a few seconds or minutes of heavy use. The fix is spreading loads or adding a circuit.
2. Short circuit
A hot conductor touching neutral or ground. The breaker trips instantly, often with a pop. Usually a damaged cord, a faulty appliance or a loose wire in a box. Don't keep resetting it.
3. Ground or arc fault
GFCI and AFCI breakers trip on leakage or arcing — sometimes from a faulty appliance, sometimes from a wiring problem in the wall. See GFCI vs AFCI.
4. A worn breaker
Breakers do wear out, and some older panel brands are known for problems. A breaker that feels warm, buzzes or won't stay reset needs replacing.
What's safe to check yourself
- Unplug everything on the circuit, reset, and plug things back in one at a time.
- Check for a tripped GFCI receptacle upstream.
- Note when it trips — immediately, after a few minutes, or only with one appliance.
When to call
If it trips instantly with nothing plugged in, if you smell burning, or if the panel is warm, switch it off and call. See repairs.
Quick questions
Can a breaker go bad?
Yes. Breakers wear, and some older panel brands have known problems. A breaker that won't hold or feels warm should be replaced.
Why does it trip only at night?
Often a load that runs then — a space heater, dehumidifier or a fridge defrost cycle — pushing a busy circuit over.
Will a bigger breaker fix it?
Never install a bigger breaker than the wire is rated for. That removes the protection and creates a fire risk.
