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This OEM contactor (Part# HN51KC024) is the factory-specified replacement for the Carrier CA13NA04200GAABA split-system air conditioner. The contactor is the high-voltage relay responsible for switching power to the compressor and condenser fan motor when the thermostat calls for cooling. When it fails, common symptoms include an AC unit that won't energize at all, a system that hums without starting, or visible pitting and burning on the contact points inside the electrical compartment.
Compatibility: Designed specifically for the Carrier CA13NA04200GAABA single-stage split-system condenser. Always confirm your existing contactor's pole count, amperage rating, and coil voltage against your unit's data plate before ordering. Our fitment team is available to verify compatibility before you buy — no guesswork required. In stock and ready to ship today.