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This OEM replacement contactor is the factory-specified part for the Carrier C4850C50ZW105610 packaged unit. The contactor is a high-voltage relay controlled by your 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 causes of an air conditioning system that simply won't turn on, hums without starting, or shows visible pitting and burning on the contact points. OEM part numbers covered by this listing: HN53CB115, HN53HF122, HN53HG120.
Compatibility: Designed for the Carrier C4850C50ZW105610 packaged unit. Cross-references OEM part numbers HN53CB115, HN53HF122, and HN53HG120 — verify your existing contactor's pole count, coil voltage, and amperage rating against your unit's data plate before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy. Order now and get same-day shipping on in-stock parts.