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This OEM replacement contactor is the factory-specified part for the Carrier C4850C48AY05161 packaged unit. The contactor is the high-voltage relay that receives a low-voltage (24V) signal from the thermostat and switches line voltage to the compressor and condenser fan motor. When the contactor fails — due to pitted contacts, a burned coil, or a stuck plunger — the unit will either refuse to start entirely, run continuously without cycling off, or exhibit erratic on/off behavior. Replacing a worn contactor is one of the most common and cost-effective HVAC service calls.
Compatibility: Designed for the Carrier C4850C48AY05161 packaged unit. Cross-references OEM part numbers HN53CB115, HN53HF122, and HN53HG120 — verify your existing part number or unit data plate before ordering to confirm correct amperage rating. Our fitment team is available to verify compatibility before you buy. Order today and receive same-day shipping on in-stock parts.