Why your breaker keeps tripping, and which cause you have

Published 2026-04-11 · 7 min read

Cause one: overload

The circuit is being asked to carry more than it was designed for. Classic signs: it trips when you run the microwave and the toaster together, or when a space heater joins anything else on the same circuit.

The fix is either moving loads to other circuits or adding a dedicated circuit for the hungry appliance. It is not a bigger breaker. Fitting a larger breaker on the same wire removes the protection and leaves the wire to overheat instead, which is the exact scenario the breaker existed to prevent.

Cause two: short circuit

A hot conductor touching a neutral or ground. This trips instantly and hard, often with a bang, and sometimes with a scorch mark. A damaged cord, a crushed cable behind a nail, or a failed appliance are the usual sources.

Test by unplugging everything on the circuit and resetting. If it holds, plug items back one at a time. If it trips with nothing connected, the fault is in the fixed wiring and needs tracing.

Cause three: ground fault

Current escaping to ground, often through moisture. In Florida this is overwhelmingly a bathroom, kitchen, garage, pool or outdoor circuit problem, and it spikes during the wet season.

GFCI devices trip on very small imbalances by design. A GFCI outlet that trips repeatedly outdoors after rain is usually telling you water has found a fitting, not that the device is faulty.

Cause four: the breaker itself

Breakers wear out. One that trips with no load, or that feels loose in the panel, or that will not reset cleanly, is often finished. Heat cycling in a hot Florida garage accelerates this.

Certain panel brands, notably Federal Pacific and Zinsco, have a documented record of breakers failing in the other direction: not tripping when they should. If your panel carries either name, the breaker behaviour is a secondary issue to the panel itself.

When to stop resetting and call someone

Stop immediately if you smell burning, if the panel or breaker is warm to the touch, if there is any buzzing or crackling from the panel, if the same breaker has tripped several times today, or if the main breaker is the one going.

Repeatedly resetting a breaker into a fault is how a manageable problem becomes a fire. A breaker is a safety device with a finite number of fault interruptions in it.