OEM Carrier Contactor HN51KC024 for Model PH13NR018000AEAA

This OEM contactor (part number HN51KC024) is the factory-specified replacement for the Carrier PH13NR018000AEAA heat pump system. The contactor is a high-voltage relay that acts as the primary switch between your thermostat's 24V control signal and the high-voltage power delivered to the compressor and condenser fan motor. When the contactor fails, the most common symptoms include the outdoor unit failing to energize at all, visible pitting or burning on the contact points, or the system running continuously without shutting off due to welded contacts.

• Specs: 2-Pole design | 24V AC coil voltage | Factory-rated amperage for Carrier PH13NR series | Direct OEM replacement — no modifications required
• OEM vs Generic: This is a genuine OEM Carrier contactor built to exact factory specifications. Generic contactors often use lower-grade contact materials that pit and weld prematurely, leading to repeat failures within one to two seasons.
• Install Difficulty: 3/5 — Always disconnect power at the disconnect box AND the breaker panel before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring before removing the old contactor. Capacitors nearby may hold a charge — discharge them safely before proceeding.
• Warranty: 1-year OEM factory warranty. Orders placed by 3 PM local time ship same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PH13NR018000AEAA heat pump. Always verify your unit's data plate and existing contactor coil voltage before ordering. If you have any fitment questions, our HVAC parts specialists are available to confirm compatibility before you purchase — no guesswork required.