OEM Carrier 2-Pole Contactor 24V Coil for Model PH12NA018000ABAA

This is the factory OEM replacement contactor for Carrier model PH12NA018000ABAA heat pump and air conditioning systems. The contactor is a high-voltage relay controlled by the 24V signal from your thermostat. When the call for cooling or heating arrives, the contactor closes its contacts to energize the compressor and condenser fan motor. A failed contactor is one of the most common causes of an outdoor unit that simply won't turn on — even when the thermostat is calling. Pitted or burned contact points, a humming coil that won't pull in, or a contactor stuck in the closed position (causing the unit to run non-stop) are all telltale signs of failure.

• Specs: 2-Pole | 24V coil voltage | 30A contact rating | Replacement for OEM part number HN51KB024 | Factory-matched contact material and coil pull-in voltage
• OEM vs Generic: This OEM contactor meets Carrier's exact coil pull-in voltage and contact surface specifications. Generic aftermarket contactors often use inferior contact alloys that pit and corrode faster under the high-amperage loads of residential compressors, shortening the service life of the repair.
• Install difficulty: 2/5 — Always disconnect power at the breaker and verify zero voltage with a multimeter before touching any terminals. Photograph all wiring before disconnecting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. The contactor typically mounts with two screws and wires terminate on labeled screw lugs.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered as a direct OEM replacement for Carrier PH12NA018000ABAA. Always cross-reference the OEM part number HN51KB024 and verify coil voltage and pole count on your unit's data plate or wiring diagram before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us anytime.