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This is the factory OEM replacement contactor (part number HN53CB115) for the Carrier C4850C48ZN030100 packaged unit. The contactor is the primary high-voltage switching relay in your system — when the thermostat calls for cooling, the 24V control circuit energizes the contactor coil, closing the high-voltage contacts that power the compressor and condenser fan motor. A failed contactor is one of the most common causes of a completely unresponsive AC system. Symptoms include the system not turning on at all, the compressor dropping out mid-cycle, or visible pitting and burning on the contact points.
Compatibility: Designed specifically for the Carrier C4850C48ZN030100 packaged unit. Always verify coil voltage (24V) and pole count against your unit's wiring diagram and data plate before ordering. Our parts specialists are available to confirm fitment — reach out before you order if you have any questions. In stock and ready to ship today.