Recognizing a failing air conditioner compressor involves observing specific mechanical and electrical symptoms. Major warning signs include loud grinding, squealing, or clicking noises coming from the outdoor unit when it tries to start, warm air blowing from vents despite the fan running, frequent circuit breaker trips caused by high electrical current draw, and the outdoor unit vibrating violently upon startup. Because the compressor is the expensive heart of your cooling system, these symptoms require immediate professional diagnostic attention. Verification: Listen closely to the outdoor condensing unit during startup and check supply vent temperatures.
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