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This is the factory OEM replacement contactor (part number HN51KC024) for the Payne PA14NA042000BAAA split-system air conditioner. The contactor is the high-voltage relay that receives a 24V signal from the thermostat and closes the circuit to power the compressor and condenser fan motor. When it fails, your system may hum with no cooling, fail to turn on at all, or run continuously without shutting off due to welded contacts.
Compatibility: This contactor is the direct OEM replacement for the Payne PA14NA042000BAAA 3.5-ton split-system condenser. Always verify coil voltage and pole configuration against your unit's data plate and wiring diagram before ordering. Not sure if this is the right part? Our HVAC parts specialists confirm fitment before you buy — no guesswork required.