OEM Carrier 2-Pole Contactor 24V Coil for Model PH13NA048000ABAA

This OEM contactor (part number HN51KC024) is the factory-specified high-voltage switching relay for the Carrier PH13NA048000ABAA split-system heat pump condenser. The contactor acts as the primary power relay between the thermostat's 24V control signal and the high-voltage supply to the compressor and condenser fan motor. When the contactor fails — due to pitted contacts, a burned coil, or a stuck plunger — the condenser unit will either fail to turn on entirely, run continuously without cycling off, or produce a loud chattering or buzzing noise from the electrical panel area.

• Specs: 2-pole configuration | 24V AC coil voltage | 30–40 amp contact rating | Factory OEM replacement — exact fit for PH13NA048000ABAA
• OEM vs Generic: This is a genuine Carrier OEM part sourced directly from the manufacturer. OEM contactors use silver-alloy contacts rated to factory spec, ensuring reliable switching life. Generic aftermarket contactors often use lower-grade contact materials that pit and fail prematurely under compressor inrush current.
• Install Difficulty: 3/5 — This repair involves high-voltage wiring (240V). Always disconnect power at the disconnect box and confirm voltage is absent with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, and a camera or phone to photograph all wiring before removal. If you are not comfortable working with high-voltage circuits, consult a licensed HVAC technician.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our warehouse.

Compatibility: Designed and factory-matched for the Carrier PH13NA048000ABAA heat pump condenser. Always verify your existing contactor's pole count, coil voltage, and amperage rating against your unit's data plate and wiring diagram before ordering. Our fitment team is available to confirm compatibility before you purchase — no guesswork required.