OEM Carrier Single-Pole Contactor 1-Pole 24V 30 Amp (HN51KC024) for Model PH16NC03000GBAAA

This is the factory OEM replacement contactor for the Carrier PH16NC03000GBAAA heat pump system. The contactor is the high-voltage relay that bridges your 24V control circuit to line voltage, energizing the compressor and condenser fan motor every time a cooling or heating call is made. When the contactor fails, the most common symptoms include the outdoor unit failing to start entirely, audible chattering or humming from the contactor coil, or the system running continuously because pitted contacts have welded themselves closed. Inspect contacts for burn marks, pitting, or carbon deposits — any of these are a clear sign it's time for a swap.

• Specs: 1-Pole | 24 VAC Coil Voltage | 30A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 50/60 Hz | OEM Part# HN51KC024
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, engineered to exact coil resistance and contact gap specifications for the PH16NC03000GBAAA. Aftermarket contactors may use lighter-gauge contacts prone to faster pitting and premature coil failure under high-cycle loads.
• Install Difficulty: 2/5 — Shut off power at the disconnect and breaker before opening the unit. Photograph all wiring before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Verify 24V coil pull-in after installation with a thermostat call.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for Carrier model PH16NC03000GBAAA. Cross-references include P282-0311, HN51CC024, P282-1304, P282-1305, 72930DP1, and 72931DP1. Always confirm the OEM part number on your unit's wiring diagram or parts list before ordering. Have a fitment question? Our HVAC parts specialists verify compatibility before you buy — contact us today.