OEM Carrier Contactor 24V Coil 2-Pole for Model PH15NB01800GBBAA

This is the factory OEM replacement contactor (part number HN51KC024) for the Carrier PH15NB01800GBBAA heat pump system. The contactor is a high-voltage relay controlled by the 24V signal from your thermostat. When the thermostat calls for cooling or heating, the contactor closes, sending 240V line power to the compressor and condenser fan motor. A failed contactor is one of the most common reasons a heat pump will not respond to a thermostat call — symptoms include the outdoor unit not starting, a chattering or buzzing noise from the contactor coil, or burned/pitted contact points visible on inspection.

• Specs: 2-Pole design | 24V AC coil voltage | Factory-rated amperage matched to OEM specification | Direct drop-in replacement for HN51KC024
• OEM vs Generic: This is the genuine Carrier OEM contactor, manufactured to exact factory tolerances. Generic contactors may use lower-grade contact materials that pit and fail faster under the high-inrush current demands of a compressor start cycle.
• Install Difficulty: 2/5 — Always disconnect and lock out power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter to verify coil voltage. Photograph all wiring before disconnecting terminals.
• Warranty: 1-year OEM factory warranty included. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Engineered as the direct OEM replacement for the Carrier PH15NB01800GBBAA heat pump. Always confirm your existing contactor's coil voltage and pole configuration against your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us before placing your order.