OEM Carrier 2-Pole Contactor 24V Coil (HN51KC024) for Model PH16NC04200GBAAA

This is the factory OEM replacement contactor for the Carrier PH16NC04200GBAAA heat pump. The contactor is a high-voltage relay controlled by your thermostat's 24V signal — when the call for cooling or heating comes in, the contactor closes to send line voltage to the compressor and condenser fan motor. When a contactor fails, the most common symptom is the outdoor unit refusing to start at all, even with the air handler running, or audible chattering and pitting on the contact points from electrical arcing over time.

• Specs: 2-Pole design | 24V AC coil voltage | 30–40 amp contact rating | Direct OEM replacement for part number HN51KC024 | Factory-matched contact gap and spring tension
• OEM vs Generic: OEM contactors use silver-alloy contact tips rated for thousands of switching cycles. Generic contactors often use cheaper alloys that pit and weld faster under the high-inrush current of a scroll compressor, shortening equipment life significantly.
• Install difficulty: 3/5 — Line-voltage work requires shutting off the disconnect and verifying zero voltage with a multimeter before proceeding. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Always photograph all wiring before disconnecting. If unsure, contact a licensed HVAC technician.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3PM local time.

Compatibility: Engineered specifically for the Carrier PH16NC04200GBAAA heat pump. Verify your existing contactor's pole count and coil voltage from the data plate or old part label before ordering. Our fitment team is available to confirm compatibility before you buy — same-day shipping on all in-stock OEM parts.