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This OEM replacement contactor is the factory-specified high-voltage relay for the Carrier C4850C48ZG055500 packaged unit. The contactor acts as the critical switching component that allows the 24V thermostat signal to close the high-voltage circuit powering the compressor and condenser fan motor. When a contactor fails, symptoms typically include the system not responding to a call for cooling, a buzzing or chattering sound from the unit, or visible pitting and burning on the contact points. OEM part numbers for this unit include HN53CB115, HN53HF122, and HN53HG120 — all factory-approved replacements for this model.
Compatibility: Engineered specifically for the Carrier C4850C48ZG055500 packaged unit. Cross-reference OEM part numbers HN53CB115, HN53HF122, or HN53HG120 against your unit's data plate to confirm fitment. Not sure if this is the right part? Our HVAC parts specialists verify compatibility before every order — contact us before you buy.