OEM Carrier 3-Pole Contactor 40A 24V Coil for Model YAC42110YACX102AK

This OEM 3-pole contactor is the factory-specified replacement for the Carrier YAC42110YACX102AK packaged or split-system unit. The contactor acts as the primary high-voltage relay in your HVAC system — when the thermostat calls for cooling or heating, the 24V control coil energizes and closes the contacts, allowing line-voltage power to flow to the compressor and associated loads. When the contactor fails, worn or pitted contacts prevent the circuit from closing, and the result is a system that simply won't turn on despite the thermostat signaling a call. In other cases, a stuck-closed contactor causes the compressor to run continuously even when no call is present — driving up energy bills and accelerating compressor wear.

• Specs: 3-Pole configuration | 40A FLA (Full Load Amperage) | 160–240 LRA | 24V coil (HN53CD024) or 208–240V/50–60Hz coil (HN53CD208) | OEM Part Numbers: HN53CD024 & HN53CD208
• OEM vs Generic: OEM contactors use factory-spec copper alloy contacts rated to exact tolerance. Generic aftermarket contactors often use lower-grade contact alloys that pit faster under inrush current, shortening service life and risking compressor damage.
• Install difficulty: 3/5 — Requires disconnecting main power at the disconnect box before any contact with the unit. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify de-energized), and a phone/camera to photograph existing wiring before removal. Always verify coil voltage on your unit's data plate matches the part ordered.
• Warranty: 1-year OEM manufacturer warranty. In-stock orders ship same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for Carrier model YAC42110YACX102AK. Two OEM part numbers cover this application: HN53CD024 (24V coil) and HN53CD208 (208–240V coil) — verify your unit's control coil voltage on the data plate before ordering. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy. Order now and receive same-day shipping.