OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
This is the factory OEM replacement contactor (part number HN53CB115) for the Carrier C4850C50AW03511 packaged unit. The contactor is a high-voltage relay controlled by the 24V thermostat signal — when the thermostat calls for cooling, the contactor closes and sends line voltage to the compressor and condenser fan motor. A failed contactor is one of the most common reasons an AC system hums but won't start, trips the breaker repeatedly, or simply won't energize at all. Pitted or burned contacts are a telltale sign it's time to replace.
Compatibility: Designed as a direct OEM replacement for Carrier model C4850C50AW03511 packaged units. Cross-reference OEM part number HN53CB115 and verify pole count and coil voltage on your unit's data plate before ordering. Not sure if this is the right part? Our HVAC parts specialists confirm fitment before your order ships — call or chat today.