How do I test electrical circuit breakers?

To test a breaker, first turn off power at the main panel. Then flip the suspect breaker off and back on. If it trips immediately or won’t reset, you might have a short circuit, loose wiring, or a bad breaker. A multimeter can test voltage, but if you’re not comfortable working inside the panel, it’s best to call a licensed electrician. Done! can inspect, test, and replace electric circuit breakers safely and quickly.