Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
This is the factory OEM replacement contactor (part number HN51KB024) for the Payne PA12NA036000AAAA split-system air conditioner. The contactor is the high-voltage relay that closes the circuit between your electrical panel and the compressor and condenser fan motor when the thermostat calls for cooling. When the contactor fails, the most common symptoms include an AC unit that won't turn on at all, a unit that hums but never starts, or visible pitting and burning on the contactor points caused by years of electrical arcing.
Compatibility: Designed as a direct drop-in replacement for the Payne PA12NA036000AAAA (3-ton single-stage split-system condenser). Always confirm coil voltage and pole configuration against your unit's data plate before ordering. Our fitment team is available to verify compatibility before you buy — in stock and ready to ship today.