OEM Carrier Contactor 24V Coil 2-Pole for Model PH10JA03600GAJAA

This is the factory OEM replacement contactor (part number HN51KC024) for the Carrier PH10JA03600GAJAA packaged heat pump unit. The contactor is a high-voltage relay controlled by the 24V signal from your thermostat or control board. When you call for cooling or heating, the contactor closes its poles to deliver line voltage to the compressor and condenser fan motor. A failed contactor is one of the most common causes of a system that simply will not turn on — or one that runs continuously without shutting off when the contacts become fused (welded) shut.

• Specs: 24V AC coil voltage | 2-pole design | Factory-rated amperage for Carrier PH10JA03600GAJAA | Direct OEM replacement, no modifications required
• OEM vs Generic: This is a genuine Carrier OEM part (HN51KC024), manufactured to exact factory tolerances. Generic contactors frequently use lower-grade contact materials that pit and weld faster under high-load cycling, shortening compressor life and creating nuisance no-start callbacks.
• Install difficulty: 3/5 — Requires shutting off both the thermostat and the main disconnect before beginning work. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, insulated gloves. Always photograph all wiring before disconnecting terminals. Verify power is off with a non-contact voltage tester before touching any leads.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PH10JA03600GAJAA packaged heat pump. Confirm coil voltage and pole count against your unit's wiring diagram and data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us anytime.