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This OEM replacement contactor is the factory-specified high-voltage switching relay for the Carrier C4850C48ZN105610 packaged unit. The contactor receives a 24V signal from the thermostat and closes its contacts to send line voltage to the compressor and condenser fan motor. When it fails, common symptoms include the AC unit not turning on, the compressor failing to energize, or — in the case of welded contacts — the system running non-stop even when cooling is not called for. OEM part numbers covered: HN53CB115, HN53HF122, HN53HG120.
Compatibility: Engineered as a direct OEM replacement for Carrier model C4850C48ZN105610 packaged units. Cross-references OEM part numbers HN53CB115, HN53HF122, and HN53HG120. Always verify pole count, coil voltage, and amperage rating on your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — no guesswork required.