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This is the factory-specified OEM replacement contactor for the Carrier C4850C48ZG055100 packaged unit. The contactor is a high-voltage switching relay that receives a 24V signal from the thermostat or control board and closes to allow line voltage to energize the compressor and condenser fan motor. When it fails — due to pitted contacts, a stuck plunger, or a burned coil — the unit will either fail to start entirely, run continuously without shutting off, or short-cycle unpredictably. Replaces OEM part numbers HN53CB115 and HN53HF122.
Compatibility: Designed specifically for the Carrier C4850C48ZG055100 packaged unit. Cross-references OEM part numbers HN53CB115 and HN53HF122. Verify pole count, coil voltage, and amperage rating on your unit's data plate before ordering. Our fitment team is available to confirm compatibility prior to purchase — order with confidence and get your system back online fast.