OEM Carrier Contactor HN52KC053 for Model YAC42110YACX302AK

This OEM contactor (part number HN52KC053) is the factory-specified high-voltage relay replacement for the Carrier YAC42110YACX302AK condensing unit. The contactor acts as the main power switch inside your outdoor unit — when the thermostat calls for cooling, the 24V control board energizes the contactor coil, closing the high-voltage contacts that supply power to the compressor and condenser fan motor. A failed contactor is one of the most common causes of an air conditioner that simply won't turn on, or one that hums but never starts. Burnt or pitted contacts, a stuck plunger, or a shorted coil are all telltale signs this part needs replacement.

• Specs: 2-Pole design | 24V AC coil voltage | High-amperage rated contacts | Direct OEM factory replacement for HN52KC053
• OEM vs Generic: This OEM contactor is manufactured to Carrier's exact coil pull-in voltage, contact material grade, and current rating. Generic contactors frequently use lower-grade contact alloys that pit and burn faster under compressor load, leading to repeat failures.
• Install Difficulty: 3/5 — Always shut off power at both the disconnect box and the breaker before proceeding. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, and electrical tape. Photograph all wiring before disconnecting. Discharge any capacitors in the unit before working near the contactor.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our NationalHVACParts.com warehouse.

Compatibility: Direct replacement for Carrier model YAC42110YACX302AK. Always verify your existing contactor's pole count, coil voltage, and amp rating against your unit's data plate and wiring diagram before ordering. Need help confirming fitment? Our HVAC parts specialists are ready to assist before you buy.