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This is the factory-specified OEM replacement contactor (part number HN51KC024) for the Payne PA12NA030000AGAA split-system air conditioner. The contactor is a high-voltage relay that acts as the main switch between your thermostat's 24V control signal and the 240V power supply feeding the compressor and condenser fan motor. When a contactor fails — due to pitted or burned contact points, a stuck plunger, or a failed coil — the most common symptoms are an AC unit that won't turn on at all, a compressor that won't start despite the fan running, or audible chattering and buzzing from the condenser cabinet.
Compatibility: Designed and tested for the Payne PA12NA030000AGAA 2.5-ton split-system condenser. Always verify the pole count, coil voltage, and amperage rating on your existing contactor's label before ordering. Our fitment team is available to confirm compatibility before you buy — ships same day, in stock now.