OEM Carrier 2-Pole Contactor 24V Coil for Model PH12NA02400GACAA

This is the factory OEM replacement contactor for the Carrier PH12NA02400GACAA heat pump / condensing unit. The contactor is the high-voltage relay that receives a 24V signal from the thermostat and closes the circuit to power the compressor and condenser fan motor. When this component fails, the most common symptom is an air conditioning or heat pump system that simply will not turn on — despite the thermostat calling for cooling or heating. You may also notice visible pitting or burning on the contact points, or hear a clicking/chattering sound as the contactor struggles to hold its position.

• Specs: 2-pole design | 24V AC coil voltage | Factory-rated amperage matched to OEM specification | Direct drop-in replacement for OEM part number HN51KB024
• OEM vs Generic: This OEM contactor is manufactured to Carrier's exact contact material and spring tension tolerances. Generic contactors often use lower-grade silver-alloy contacts that pit and burn faster, leading to repeat failures and potential compressor damage from voltage drop.
• Install difficulty: 3/5 — Always disconnect power at the disconnect box and verify zero voltage with a multimeter before touching any terminals. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring before removal. The line-voltage (L1/L2) and load (T1/T2) terminals must be correctly re-terminated.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PH12NA02400GACAA unit. Always verify coil voltage and pole count against your unit's data plate or wiring diagram before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — reach out before placing your order.