OEM Carrier 1-Pole Contactor 24V 30A — HN51KC024 for Model PH3ZNB036000AA

This is the genuine OEM Carrier contactor (part# HN51KC024), the factory-specified high-voltage relay for the Carrier PH3ZNB036000AA heat pump system. The contactor is the critical switching component that receives a 24V signal from the thermostat and closes to deliver line voltage to the compressor and/or condenser fan motor. When the contactor fails — through burned contacts, a welded-shut coil, or a failed coil — you'll typically experience symptoms such as: the outdoor unit not energizing at all, the system humming without the compressor starting, or the unit running continuously without shutting off.

• Specs: 1-Pole (single-pole) | 24 VAC coil voltage | 30 Amps FLA | 150 Amps LRA | 50/60 Hz | Factory OEM part number HN51KC024
• OEM vs Generic: OEM Carrier contactors are manufactured to exact factory tolerances with silver-alloy contacts rated for the full 30A load. Generic aftermarket contactors frequently use lower-grade contact materials that pit and burn prematurely, leading to repeat failures within a single season.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Always photograph existing wiring before disconnecting any leads. After installation, verify contactor pull-in by confirming 24V across coil terminals on a thermostat call.
• Warranty: Backed by a 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed and factory-specified for the Carrier PH3ZNB036000AA heat pump system. Also cross-references to Carrier Bryant and Payne units listing HN51KC024 in their official parts list. Verify your unit's wiring diagram and data plate before ordering — our team is available to confirm fitment prior to purchase.