OEM Carrier 2-Pole Contactor 24V Coil for Model PH13NB042000ABAA

This is the factory OEM replacement contactor (part number HN51KC024) for the Carrier PH13NB042000ABAA split-system heat pump / air conditioner. The contactor is a high-voltage relay controlled by the 24V thermostat circuit — it is the component responsible for switching line voltage to the compressor and condenser fan motor every time your system calls for cooling or heating. When the contactor fails, the most common symptoms are an air conditioner that simply won't turn on, a unit that hums but never fully engages, or visible pitting and burn marks on the contact points from years of high-amperage switching cycles.

• Specs: 2-Pole configuration | 24V AC coil voltage | Replaces OEM part number HN51KC024 | Factory-rated contact amperage for Carrier PH13NB-series equipment
• OEM vs Generic: This is a genuine Carrier OEM contactor manufactured to exact factory contact gap, coil pull-in voltage, and arc suppression specifications. Generic contactors may use lower-grade contact materials that pit faster under load, leading to premature failure and potential compressor damage.
• Install Difficulty: 3/5 — LINE VOLTAGE IS PRESENT at the contactor even with the thermostat off. Always shut off the disconnect box and verify zero voltage with a meter before touching any wires. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label all wires before removal and replace one wire at a time.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Engineered as a direct drop-in replacement for Carrier model PH13NB042000ABAA. Always verify the OEM part number on your existing contactor's label before ordering to confirm fitment. Our team is available to verify compatibility prior to purchase — reach out before you order and we'll confirm the right part for your unit. In stock and ready to ship today.