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This OEM contactor (part number HN51KC024) is the factory-specified replacement for the Payne PA12NA036000ACAA split-system air conditioner. The contactor is a high-voltage relay controlled by a 24V signal from your thermostat — when the thermostat calls for cooling, the contactor closes and sends line voltage to the compressor and condenser fan motor. When it fails, the most common symptoms are an AC unit that won't turn on at all, a compressor that runs continuously without cycling off, or visible pitting and burning on the contact points inside the unit.
Compatibility: Designed specifically for the Payne PA12NA036000ACAA 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. If you have any fitment questions, our HVAC parts specialists are available to confirm compatibility before you purchase — we want to make sure you get the right part the first time.