OEM Carrier 1-Pole Contactor 30 Amp 24V Coil — HN51KC024 for Model PY4GNAB30040AA

This is the genuine OEM factory-replacement contactor for the Carrier PY4GNAB30040AA packaged or split-system unit. The contactor is the high-voltage relay that bridges line voltage (240V) to the compressor and condenser fan motor whenever the thermostat sends a 24V call for cooling. When this part fails, you'll typically experience one or more of the following: the system completely fails to start, the contactor chatters or hums audibly at the unit, the compressor runs continuously even with the thermostat off (welded contacts), or the unit trips the breaker on startup. Replacing this part is one of the most common and cost-effective AC repairs available.

• Specs: 1-pole configuration | 30A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 24 VAC coil voltage | 50/60 Hz | OEM part number HN51KC024
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part engineered to exact OEM contact-gap tolerances and coil resistance specs. Generic contactors often use lower-grade silver alloy contacts that pit faster under load, shortening service life — especially critical for compressors drawing high LRA on startup.
• Install difficulty: 2/5 — Always shut off power at the disconnect and breaker before opening the control compartment. Photograph all wiring before disconnecting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, non-contact voltage tester. Verify 24V pull-in with a thermostat call after installation. Average install time: 20–30 minutes.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PY4GNAB30040AA. Also cross-references to P282-0311, HN51CC024, P282-1304, P282-1305, P282-1308, and other superseded part numbers. Always verify the part number against your unit's wiring diagram or data plate before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — contact us today.