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This is the factory OEM replacement contactor for the Carrier PY3GNAA42060NA packaged unit. The contactor is the high-voltage relay that receives a 24V signal from the thermostat control board and closes to energize the compressor and/or fan motor at line voltage. When the contactor fails — through burned contacts, a welded-shut coil, or a failed coil — the system will either refuse to turn on entirely, run continuously without shutting off, or trip the breaker. Replacing it is one of the most common and cost-effective AC repairs available.
Compatibility: Designed for Carrier model PY3GNAA42060NA packaged units. Verify your unit's wiring diagram and parts list confirms HN51KC024 before ordering. Not sure? Our fitment team confirms compatibility before you buy — contact us today and get your unit running again fast.