GFCI and Breaker Both Tripped: What It Means
A standard breaker needs to see far more current than a GFCI's few-milliamp sensitivity threshold before it trips — so a combined trip event signals a fault of meaningfully larger magnitude.
Why this combination is more serious than a GFCI trip alone
A GFCI can trip on a tiny current leak that would never register with a standard breaker. If the breaker also trips, the fault current involved is large enough to cross that much higher threshold — which usually means either a genuine short circuit, a significantly overloaded circuit, or a more serious wiring fault than typical nuisance-trip causes.
What to do next
Don't simply reset both and move on. Unplug everything on the circuit, reset the breaker first, then the GFCI, and bring in a licensed electrician if it happens again — especially if you notice any warmth, discoloration, or burning smell anywhere along that circuit.