OEM Carrier Contactor 24V Coil 2-Pole for Model PH3ZNA036000AA

This is the factory OEM replacement contactor (part# HN51KB024) for the Carrier PH3ZNA036000AA split-system heat pump or condensing unit. The contactor is a high-voltage relay that acts as the primary on/off switch for your compressor and condenser fan motor. When the thermostat calls for cooling or heating, the 24V control circuit energizes the contactor coil, closing the high-voltage contacts and powering the compressor. When a contactor fails, the most common symptoms are an air conditioner or heat pump that simply will not turn on, buzzing or chattering at the contactor, or visible pitting and burning on the contact surfaces.

• Specs: OEM Part# HN51KB024 | 2-Pole design | 24V AC coil voltage | Rated for high-amperage compressor loads | Direct factory-spec replacement
• OEM vs Generic: This OEM contactor is manufactured to Carrier's exact contact material, coil pull-in voltage, and amperage rating specifications. Generic aftermarket contactors may use lower-grade contact alloys that pit and fail faster under the high inrush current of scroll compressors.
• Install Difficulty: 2/5 — Always disconnect power at the breaker and wait 5 minutes before servicing. Tools needed: 1/4" and 5/16" nut drivers, flathead screwdriver, needle-nose pliers, and a multimeter to verify coil continuity. Photograph all wiring before removal.
• Warranty: 1-year OEM factory warranty against defects. Orders ship same business day from our warehouse when placed before 3 PM local time.

Compatibility: Engineered specifically for the Carrier PH3ZNA036000AA unit. Verify your existing contactor's coil voltage and pole configuration against your unit's wiring diagram before ordering. Our technical team is available to confirm fitment — reach out before you buy if you have any questions. In stock and ready to ship today.