OEM Carrier Contactor 24V Coil 2-Pole for Model PH4ANG018000BAAA

This OEM replacement contactor (part number HN51KC024) is the factory-specified high-voltage switching relay for the Carrier PH4ANG018000BAAA heat pump system. The contactor acts as the electrical bridge between your 24V thermostat control signal and the high-voltage power supply to the compressor and condenser fan motor. When the contactor fails, the most common symptom is an air conditioning or heat pump system that simply will not turn on — the thermostat calls for cooling or heating, but nothing happens at the outdoor unit.

• Specs: 24V AC coil voltage | 2-pole configuration | Factory-matched contact ratings | OEM part number HN51KC024 | Direct drop-in replacement, no modifications required
• OEM vs Generic: This OEM contactor is manufactured to Carrier's exact coil voltage and contact amperage specifications. Generic contactors frequently use lower-grade contact materials that pit and burn faster under load, leading to premature failure and potential compressor damage.
• Install difficulty: 3/5 — Always shut off power at both the disconnect and the breaker panel before beginning work. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before disconnecting. Contact terminals carry line voltage — exercise extreme caution.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship the same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement for Carrier model PH4ANG018000BAAA. Always verify coil voltage and pole configuration against your unit's data plate and wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — reach out before you order if you have any questions.