Tripping on startup is motor/compressor inrush — test that appliance elsewhere; if it trips that circuit too, the appliance is the issue.
Stop and call a licensed electrician or emergency services now if there's smoke, sparks, a burning smell, heat, shock, or water near the problem. Otherwise it's safe to answer the questions below.
The likely readout
Most likely cause
Inrush trip — a motor or compressor's startup surge trips it; suspect that specific appliance or a weak breaker
Ranked by fit to your answers
1
Inrush trip — a motor or compressor's startup surge trips it; suspect that specific appliance or a weak breaker
78
SAFE NEXT CHECKUnplug the suspect appliance and see if the breaker holds; if it does, the appliance or its startup current is the issue. If it trips even with that appliance removed, treat it as a fault.
Where to stop. Resetting a breaker once is homeowner-safe. A breaker that keeps tripping is protecting against a real fault or overload — do not repeatedly reset it, and never tape, wedge, or oversize it. Opening the panel and any wiring repair is a licensed electrician's job. This is general information, not a quote and not a substitute for a licensed electrician.
Try the safe next check above. If it doesn't resolve it, or would mean working on wiring or a panel, stop and call a licensed electrician — don't replace parts on a guess. Open the full tool to change any answer for your exact situation, or try a related check below.
Electrical Fault Check provides general diagnostic information only. It is not professional advice, not a quote, and not a substitute for a licensed electrician. Do not work on live wiring. If you see smoke, sparks, burning smell, heat, shock, water exposure, or repeated tripping, stop using the circuit and contact a licensed electrician or emergency services as appropriate.