OEM Carrier Contactor 24V 2-Pole for Model PH13NB02500GAAAA (HN51KC024)

This is the factory OEM replacement contactor for the Carrier PH13NB02500GAAAA heat pump condensing unit. The contactor is a high-voltage relay controlled by your thermostat's 24V signal — when the thermostat calls for cooling or heating, the contactor closes and sends line voltage to the compressor and condenser fan motor. A failed contactor is one of the most common reasons a heat pump outdoor unit won't energize: symptoms include the system not turning on at all, chattering or buzzing at the contactor, pitting or burned contacts, or the unit running continuously without shutting off.

• Specs: OEM Part Number HN51KC024 | 2-Pole design | 24V AC coil voltage | Factory-rated amperage for Carrier PH13NB02500GAAAA — matches unit data plate specifications exactly
• OEM vs Generic: This is a genuine OEM Carrier contactor, built to exact factory specifications. Generic aftermarket contactors may use lower-grade contact materials that pit faster under load, increasing the risk of premature failure and compressor damage.
• Install difficulty: 3/5 — Requires shutting off power at both the breaker and disconnect box before servicing. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Always photograph all wiring connections before removal. Discharge any capacitors in the unit before working nearby.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed as a direct OEM replacement for Carrier model PH13NB02500GAAAA heat pump condensing units. Always cross-reference the OEM part number HN51KC024 on your existing contactor label or unit wiring diagram before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you buy — no guesswork required.