OEM Carrier 1-Pole Contactor 25A 24V Coil — HN51KB024 for Model PH10JA024000ADAA

This OEM contactor is the factory-specified replacement for the Carrier PH10JA024000ADAA heat pump system. The contactor is a high-voltage relay that closes the circuit to power the compressor and condenser fan motor every time the thermostat calls for cooling or heating. When the contactor fails, the most common symptom is an outdoor unit that simply will not turn on — even while the indoor air handler continues to run — or the system may exhibit erratic short-cycling, buzzing, or pitting on the contact points due to electrical arcing over time.

• Specs: 1-Pole | 25A Full Load Amps (FLA) | 24V AC 50/60Hz Coil | Definite Purpose Contactor | Factory-matched Carrier OEM replacement part number HN51KB024
• OEM vs Generic: This is a genuine OEM Carrier contactor built to factory tolerances. Generic aftermarket units may have inferior contact materials, leading to faster pitting, coil burnout, and premature compressor failure — especially in high-cycle residential applications.
• Install Difficulty: 2/5 — Disconnect and lock out all power before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, and electrical tape. Always photograph existing wiring before removing the old contactor. Discharge any residual voltage and confirm all terminals match before energizing.
• Warranty: 1-year OEM manufacturer warranty. In-stock orders ship same business day from our warehouse.

Compatibility: Designed for the Carrier PH10JA024000ADAA heat pump unit. Verify your unit's data plate for pole count, coil voltage, and amperage rating before ordering. Our fitment team is available to confirm compatibility prior to purchase — don't hesitate to reach out. Order now and ship today!