OEM Carrier Contactor 24V Coil 2-Pole for Model PY1PNA042100ADBA

This is the factory OEM replacement contactor (part number HN51KB024) for the Carrier PY1PNA042100ADBA packaged unit. The contactor is a high-voltage relay that receives a low-voltage (24V) signal from the thermostat or control board and switches line voltage to the compressor and condenser fan motor. When the contactor fails — due to pitted or burned contacts, a stuck plunger, or a failed coil — the system will either refuse to start entirely, run continuously without shutting off, or short-cycle under load.

• Specs: 2-Pole configuration | 24V AC coil voltage | 40A contact rating | Direct OEM factory replacement for part number HN51KB024
• OEM vs Generic: This OEM contactor uses factory-spec silver-alloy contacts and a precision-wound coil, delivering tighter pull-in voltage tolerance and longer service life versus generic contactors that may use inferior contact materials prone to early pitting.
• Install difficulty: 3/5 — Requires disconnecting line-voltage power at the disconnect box before servicing. Tools needed: flathead and Phillips screwdrivers, 1/4" and 5/16" nut drivers, needle-nose pliers, multimeter (to verify coil continuity and contact resistance). Always photograph existing wiring before removal.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders ship same business day from our stocked warehouse.

Compatibility: Engineered specifically for the Carrier PY1PNA042100ADBA packaged unit. Always confirm coil voltage and pole configuration on your unit's data plate before ordering. Our HVAC parts specialists are available to verify fitment — contact us before you buy if you have any questions.