OEM Carrier Contactor 24V Coil 2-Pole for Model PY3GNA030040AB

This is the factory OEM replacement contactor (part number HN51KB024) for the Carrier PY3GNA030040AB packaged unit. The contactor is a high-voltage relay controlled by your thermostat's 24V signal — it switches line voltage to the compressor and condenser fan motor every time a cooling call is made. When the contactor fails, the most common symptoms include the outdoor unit failing to energize at all, intermittent cooling loss, or visible pitting and burning on the contact points.

• Specs: 2-pole configuration | 24V control coil | Factory-rated amperage for Carrier PY3GNA030040AB | Direct OEM replacement for part number HN51KB024
• OEM vs Generic: This OEM contactor is manufactured to exact Carrier factory specifications, including contact material grade and coil pull-in voltage tolerance. Generic contactors may use lower-grade silver-alloy contacts that pit faster under load cycling, shortening service life.
• Install Difficulty: 2/5 — Always disconnect power at the disconnect box and confirm voltage is zero with a multimeter before touching any terminals. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring before removal.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed as a direct drop-in replacement for Carrier model PY3GNA030040AB. Always verify coil voltage and pole configuration against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — no guesswork required.