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This is the factory-specified OEM replacement contactor for the Carrier C4850C50ZN050100 packaged unit. The contactor is a high-voltage relay that receives a 24V signal from the thermostat and closes to send line voltage to the compressor and condenser fan motor. When a contactor fails — due to pitted contacts, a burned coil, or a stuck armature — the system will either refuse to start entirely, run continuously without shutting off, or trip the breaker repeatedly. Replacing it with the correct OEM part (HN53CB115) restores reliable switching and protects downstream components.
Compatibility: Designed and factory-specified for the Carrier C4850C50ZN050100 packaged unit. Always verify coil voltage and pole configuration on your unit's data plate before ordering. Our parts specialists are available to confirm fitment — don't hesitate to reach out before you buy. In stock and ready to ship today.