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This is the OEM factory-specified contactor (part number HN51KC024) for the Carrier CA13NA0360NGACBA split-system air conditioner. The contactor is a high-voltage relay that controls power delivery to the compressor and condenser fan motor. When the thermostat calls for cooling, a 24V signal from the control board energizes the contactor coil, closing the contacts and allowing 240V line power to flow. A failed contactor typically presents as an AC unit that won't turn on at all, chatters or buzzes loudly at the outdoor unit, or — in cases of welded contacts — runs continuously and won't shut off.
Compatibility: Designed and factory-matched for the Carrier CA13NA0360NGACBA 3-ton split-system condenser. Always verify your existing contactor's pole count, coil voltage, and amperage rating against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — same-day shipping ensures your repair stays on schedule.