OEM Carrier Contactor 24V 2-Pole for Model PH13NR018000ACAA

This is the factory-specified OEM contactor (part number HN51KC024) for the Carrier PH13NR018000ACAA heat pump/split-system condenser. The contactor is the high-voltage switching relay that receives a 24V signal from the thermostat or control board and closes the circuit to energize the compressor and condenser fan motor. When the contactor fails, the most common symptoms include the outdoor unit failing to turn on, the compressor not starting despite the thermostat calling for cooling or heating, chattering or buzzing noises from the contactor coil, or visible pitting and burning on the contact points.

• Specs: 24V AC coil voltage | 2-pole configuration | Rated for high-voltage load side (240V) | Factory-matched contact material for long service life
• OEM vs Generic: This OEM HN51KC024 contactor meets Carrier's exact electrical specifications, including contact gap, coil pull-in voltage, and contact rating. Aftermarket contactors may use inferior contact alloys that arc and pit faster under cycling loads, shortening system life.
• Install difficulty: 2/5 — Always disconnect power at the breaker and verify zero voltage with a multimeter before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all high-voltage and low-voltage wiring terminals before disconnecting.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Directly replaces the factory contactor in Carrier model PH13NR018000ACAA. Always verify your existing contactor's coil voltage, pole count, and amperage rating against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you purchase — same-day shipping on all stocked OEM parts.