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This OEM replacement contactor is the factory-specified high-voltage relay for the Carrier C50A402522 commercial packaged unit. The contactor acts as the primary switching device that connects line voltage to the compressor and condenser fan motor when the thermostat calls for cooling. A failed contactor is one of the most common causes of a system that simply won't turn on — symptoms include the outdoor unit staying completely off, a chattering or buzzing noise from the contactor itself, or burned/pitted contact points visible on inspection. OEM part numbers HN53CB115 and HN53CD115 are both covered by this listing.
Compatibility: Designed for the Carrier C50A402522 packaged unit. Replaces OEM part numbers HN53CB115 and HN53CD115. Always confirm coil voltage and pole configuration against your unit's wiring diagram and data plate before ordering. Our parts specialists are available to verify fitment — reach out before you order if you have any questions. Order now and receive same-day shipping from our dedicated HVAC parts warehouse.