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This OEM replacement contactor is the factory-specified high-voltage relay for the Carrier C50A505022 commercial packaged unit. The contactor acts as the primary power switch for the compressor and condenser fan motor, controlled by a 24V signal from the thermostat or control board. When the contactor fails — due to pitted contacts, coil burnout, or a stuck plunger — the system will either fail to start entirely, run continuously without shutting off, or trip the breaker repeatedly. OEM part numbers for this contactor are HN53CD115 and HN53HF122.
Compatibility: Designed specifically for the Carrier C50A505022 commercial packaged rooftop unit. Cross-references OEM part numbers HN53CD115 and HN53HF122. Always confirm coil voltage and pole configuration on your unit's data plate before ordering. Our fitment team is available to verify compatibility before you purchase — same-day shipping ensures your equipment is back online fast.