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This is the factory OEM replacement contactor (part number HN52TC040) for the Carrier GC072HSLNDET1XX1 condensing unit. The contactor is the primary high-voltage relay in your outdoor unit — it receives a 24V signal from the thermostat and closes to send 240V power to both the compressor and condenser fan motor. When the contactor fails, the most common symptoms include the air conditioner not turning on at all, the unit humming but failing to start, or visible pitting and burning on the contact points discovered during inspection. A worn contactor can also cause intermittent operation and compressor damage over time if left unaddressed.
Compatibility: Engineered specifically for the Carrier GC072HSLNDET1XX1 condensing unit. Always verify the OEM part number on your existing contactor's label and confirm coil voltage and pole configuration on your unit's wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — reach out before you order if you have any questions. Order today for same-day shipping and get your system back online fast.