Breaker trips frequently when the air conditioner starts or runs.

Safety: Do not repeatedly reset a tripping breaker; this is a fire hazard. Turn the breaker off and leave it off until the issue is resolved.

Steps:

• Check circuit rating: Verify that the breaker and wiring size match the unit's nameplate requirements.
• Inspect cord and plug: For window/portable units, check for damage or overheating at the plug.
• Internal inspection: With power off, inspect wiring inside the unit for burnt insulation, loose connections, or wires touching sharp metal edges.
• Capacitor and motors: A technician should test the compressor and fan motors, and replace any failed capacitors or motors.

Professional help: Electrical faults can be dangerous; if you are not trained, contact an electrician or HVAC technician.