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This OEM replacement contactor is the factory-specified part for the Carrier C4850C48Z8090110 packaged unit. The contactor acts as a high-voltage relay, receiving a 24V signal from the thermostat and closing the circuit to supply line voltage to the compressor and condenser fan motor. When the contactor fails, symptoms include the system failing to start on a call for cooling, a buzzing or chattering sound from the disconnect box, or visible pitting and burning on the contact points.
Compatibility: Designed for the Carrier C4850C48Z8090110 packaged unit. This part supersedes or cross-references OEM part numbers HN53CB115, HN53HF122, and HN53HG120 — all are functionally equivalent 2-pole, 24V coil contactors. Verify your existing contactor's pole count, coil voltage, and amperage rating against your unit's data plate before ordering. Our parts specialists are available to confirm fitment prior to purchase.