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This is the factory OEM replacement contactor (part number HN53CB115) for the Carrier C4850C48AY04111 packaged unit. The contactor is a high-voltage relay controlled by a 24V signal from the thermostat or control board. When the thermostat calls for cooling, the contactor closes its contacts and allows line voltage to energize the compressor and condenser fan motor. A failed contactor is one of the most common reasons a system hums without starting, fails to respond to a cooling call, or trips the breaker repeatedly due to pitted or welded contacts.
Compatibility: Engineered specifically for the Carrier C4850C48AY04111 packaged unit. Always verify your existing contactor's pole count, coil voltage, and amperage rating against your unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment before you buy — no guesswork required. Order now and ship today!