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This is the factory OEM replacement contactor (part number HN51JD026) for the Carrier CA13NA06000GAAAA split-system air conditioner. The contactor is a high-voltage relay controlled by the 24V thermostat signal — when the thermostat calls for cooling, the contactor closes to send 240V power to the compressor and condenser fan motor. A failed contactor is one of the most common reasons an AC system won't respond to a cooling call, produces a loud chattering or buzzing from the outdoor unit, or runs continuously without shutting off when contacts weld together.
Compatibility: Designed and factory-specified for the Carrier CA13NA06000GAAAA split-system condenser. Verify coil voltage (24V) and pole count on your existing contactor's label before ordering. Our HVAC parts specialists are available to confirm fitment — we verify compatibility before you buy. Order today and get same-day shipping on in-stock OEM parts.