OEM Carrier Contactor 24V 2-Pole for Model PH13NR018000AHAA

This is the factory OEM replacement contactor (part number HN51KC024) for the Carrier PH13NR018000AHAA heat pump condenser. The contactor is the high-voltage relay that bridges the 24V control signal from your thermostat to the 240V power supply feeding the compressor and condenser fan motor. When it fails, the most common symptoms are the outdoor unit failing to energize at all, the contactor chattering or buzzing loudly, or pitted/burned contacts causing intermittent cooling. Replacing a worn contactor promptly prevents downstream damage to the compressor — one of the most expensive components in any system.

• Specs: 2-Pole design | 24V coil voltage | High-amperage contacts rated for compressor load | Factory-matched OEM specification for model PH13NR018000AHAA
• OEM vs Generic: This OEM contactor uses factory-spec contact material and coil windings, ensuring consistent pull-in voltage and long service life. Generic contactors often use lower-grade contact alloys that pit and weld faster, especially in high-cycle climates.
• Install difficulty: 2/5 — Always disconnect power at the disconnect box and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wire connections before removal. Swap wires one at a time to avoid miswiring.
• Warranty: 1-year OEM factory warranty. Orders placed before the cutoff ship same business day from our warehouse.

Compatibility: Designed specifically for the Carrier PH13NR018000AHAA heat pump. Verify coil voltage and pole configuration on your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — reach out before placing your order.