OEM Carrier Contactor 24V Coil 2-Pole for Model TCHC2550HECMRMY502

This OEM contactor (part number HN53TZ024) is the factory-specified high-voltage relay for the Carrier TCHC2550HECMRMY502 condensing unit. The contactor acts as the main power switch between your electrical supply and the compressor and condenser fan motor — it engages every time your thermostat calls for cooling. When the contactor fails, the most common symptom is an air conditioner that simply won't turn on, even though the thermostat is sending a signal. You may also notice pitting or burning on the contact points, a stuck-open or stuck-closed contactor, or audible chattering from the contactor coil.

• Specs: 24V coil voltage | 2-pole configuration | Factory OEM part number HN53TZ024 | Designed for R-410A split-system condensing units
• OEM vs Generic: This OEM contactor is manufactured to Carrier's exact coil pull-in voltage and contact ampacity specifications. Generic contactors often use lower-grade contact materials that pit and corrode faster, leading to premature compressor failure and nuisance callbacks.
• Install Difficulty: 2/5 — Always disconnect and lock out power at the disconnect box before servicing. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter, and electrical tape. Photograph all wiring connections before removal to ensure correct reinstallation.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Directly replaces the OEM contactor in Carrier model TCHC2550HECMRMY502. Always verify coil voltage and pole configuration against your unit's wiring diagram and data plate before ordering. Our technical team is available to confirm fitment prior to purchase — order with confidence from NationalHVACParts.com.