Why Does My Air Conditioner Breaker Trip Only When the AC Starts?
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An air conditioner that trips the breaker only when it starts usually has a problem that appears during the initial electrical load. The AC circuit breaker may respond to excessive current caused by a failing capacitor, compressor problem, wiring fault, or power-supply issue. Startup-only tripping is an important clue because the fault occurs when the compressor or another high-load component is energized. This blog explains why an AC breaker trips during startup, which HVAC components commonly cause the problem, what you can safely check, and when professional repair or replacement is necessary. What Causes an AC Circuit Breaker to Trip at Startup? When an air conditioner starts, the compressor and motors require a brief increase in electrical current. If that demand becomes excessive, the AC circuit breaker can trip to protect the equipment and electrical circuit. 1. Weak or Failed Capacitor A damaged capacitor may not provide enough starting assistance for the compressor or fa...