A power surge that trips the AC circuit breaker could be caused by a simple electrical issue within the air conditioner. A loose connection, a failed capacitor, or a short in the wiring could be responsible. Those issues can be fixed easily by a professional.

What causes AC breaker to keep tripping?

Typically, your AC breaker trips when there's a short circuit, the AC is overworking or a part is bad or malfunctioning. If you continue to run your AC, you could permanently damage the air conditioner. Get a professional AC repair tech out as soon as you can.

How do you know if your AC breaker is bad?

Test the circuit breaker in the "off" position. Switch the breaker to "off" and test both sides of the switch as in Step 7 above. The ohmmeter should read a full open or infinite Ohms condition. If the breaker shows any continuity, the breaker is bad and should be replaced.