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This is the factory-specified OEM replacement contactor for the Carrier C4850C48ZN075610 packaged unit. The contactor is a high-voltage relay controlled by the 24V signal from your thermostat or control board — when energized, it closes the high-voltage circuit to the compressor and condenser fan motor. A failed contactor is one of the most common reasons a packaged unit simply won't turn on, buzzes without starting, or runs intermittently. Pitted or burned contacts, a stuck plunger, or a failed coil are all telltale signs it's time for a replacement. Replaces OEM part numbers HN53CB115, HN53HF122, and HN53HG120.
Compatibility: Engineered specifically for the Carrier C4850C48ZN075610 packaged unit. Cross-references OEM part numbers HN53CB115, HN53HF122, and HN53HG120. Always verify pole count, coil voltage, and amperage rating against your unit's data plate before installing. Our parts specialists are available to confirm fitment — reach out before you order if you have any questions. In stock and ships today.