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This is the factory-specified OEM replacement contactor for the Carrier C4850C50AY04161 packaged unit. The contactor is a high-voltage relay that receives a 24V signal from the thermostat or control board and closes the circuit to send line voltage to the compressor and condenser fan motor. When the contactor fails — through burned or pitted contacts, a stuck plunger, or a failed coil — the system will either refuse to start entirely, run continuously without shutting off, or trip the breaker repeatedly. OEM part numbers HN53CB115 and HN53HF122 are both verified factory replacements for this model.
Compatibility: Designed as a direct OEM replacement for Carrier C4850C50AY04161. Cross-reference your existing contactor's pole count, coil voltage, and amperage rating against your unit's data plate before ordering. Replaces OEM part numbers HN53CB115 and HN53HF122. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us before placing your order.