OEM Carrier Contactor 24V Coil 2-Pole for Model PY3GNAA24040AA

This is the factory OEM replacement contactor (part number HN51KC024) for the Carrier PY3GNAA24040AA packaged unit. The contactor is the high-voltage relay that receives a 24V signal from the thermostat or control board and closes to send line voltage to the compressor and/or condenser fan motor. When a contactor fails — whether due to pitted contacts, a burned coil, or a stuck plunger — the most common symptom is an air conditioning system that simply will not turn on, or one that runs continuously without cycling off.

• Specs: 24V AC coil voltage | 2-pole configuration | Replaces OEM part number HN51KC024 | Factory-matched contact rating for the PY3GNAA24040AA unit
• OEM vs Generic: This OEM contactor is built to Carrier's exact contact gap, coil pull-in voltage, and amperage ratings. Generic contactors can have inconsistent coil resistance and lower-grade contact materials, leading to premature pitting and failure — especially in high-cycle cooling seasons.
• Install difficulty: 3/5 — Work must be performed with power fully disconnected at the disconnect box AND the breaker panel. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, and wire labels or tape for documenting existing wiring. Photo all wire positions before removal.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship the same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement for Carrier model PY3GNAA24040AA. Always verify the coil voltage and pole configuration on your existing contactor's data label before ordering. Our fitment specialists are available to confirm compatibility — just reach out before you buy.