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This is the factory OEM replacement contactor (part number HN53CB115) for the Carrier C4850C50AY02761 packaged unit. The contactor is a high-voltage relay that receives a 24V signal from the thermostat and closes to send line voltage to the compressor and condenser fan motor. When it fails — due to pitted or burned contacts, a stuck plunger, or a failed coil — the system will either not respond to a cooling call at all, or it may run continuously without shutting off. Replacing a worn contactor is one of the most common and cost-effective repairs in the field.
Compatibility: Designed specifically for the Carrier C4850C50AY02761 packaged unit. Always verify the OEM part number on the original contactor label and cross-reference with your unit's wiring diagram before ordering. Our HVAC parts team is available to confirm fitment prior to purchase — don't guess on a high-voltage component. Order today and receive same-day shipping on all in-stock parts.