OEM Carrier Single-Pole Contactor 24V 30A (HN51KC024) for Model PH15NA018000BAAA

This is the genuine OEM factory-specified contactor for the Carrier PH15NA018000BAAA heat pump. The contactor acts as a high-voltage relay controlled by the 24V thermostat signal: when a cooling or heating call is made, the 24V coil pulls in the contacts and routes line-voltage power to the compressor and condenser components. A failing contactor is one of the most common reasons an HVAC system won't turn on, won't turn off, chatters audibly, or trips a breaker. Pitted or welded contacts and an open coil are the primary failure modes — both are fixed by this direct OEM replacement.

• Specs: 1-Pole | 24 VAC Coil | 30A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 50/60 Hz | OEM Part # HN51KC024
• OEM vs Generic: This is the genuine Carrier Factory Authorized Part, manufactured to exact coil pull-in voltage and contact material specifications. Aftermarket contactors frequently use lower-grade contact alloys that pit faster and coils that drop out at marginal 24V signal levels — accelerating compressor wear and nuisance lockouts.
• Install difficulty: 2/5 — Disconnect and lock out all power before proceeding. Tools needed: ¼" nut driver, needle-nose pliers, multimeter. Photograph all wiring before disconnecting — note that low-voltage coil leads may be on opposite sides from your original unit. Verify 24V pull-in after installation with a thermostat call.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PH15NA018000BAAA heat pump. Also fits a broad range of Carrier, Bryant, and Payne systems specifying HN51KC024 in their official parts list. Always verify the part number against your unit's wiring diagram or data plate before ordering. Need help confirming fitment? Our HVAC parts team is ready to assist before you buy.