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This OEM replacement contactor (part number HN51KC024) is the factory-specified high-voltage relay for the Payne PA4ANG030000BCAA split-system air conditioner. The contactor acts as the primary switching device that allows 240V power to reach the compressor and condenser fan motor when the thermostat calls for cooling. A failed contactor is one of the most common causes of an AC unit that hums but won't start, fails to energize at all, or runs continuously without shutting off due to welded contacts.
Compatibility: Designed as a direct drop-in replacement for the Payne PA4ANG030000BCAA split-system condenser. Always verify your existing contactor's pole count, coil voltage, and amperage rating against your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — reach out before placing your order.