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This OEM replacement contactor is the factory-specified part for the Carrier C4850C50Z2055200 packaged unit. The contactor is a high-voltage relay controlled by the thermostat's 24V signal — when the call for cooling comes in, the contactor closes and delivers line voltage to the compressor and condenser fan motor. A failed contactor is one of the most common reasons an air conditioning system will not start, will short-cycle, or will run constantly without cycling off. Pitted, burned, or stuck contacts are the telltale signs it's time for a replacement.
Compatibility: Designed for the Carrier C4850C50Z2055200 packaged unit. This part supersedes OEM part numbers HN53CB115, HN53HF122, and HN53HG120 — all three are covered by this single listing. Always verify coil voltage and pole count on your unit's data plate before ordering. Our parts specialists are available to confirm fitment prior to purchase.