OEM Carrier 2-Pole Contactor 40 Amp 24V for Model TCHC0250HEFMRAF121

This OEM contactor (part# HN52TC040) is the factory-specified high-voltage relay for the Carrier TCHC0250HEFMRAF121 system. The contactor acts as the primary electrical switch that allows 240V power to flow to the compressor and condenser fan motor whenever the thermostat calls for cooling. When the contactor fails — due to pitted contacts, a burned coil, or a welded set of contacts — the system will either refuse to turn on entirely, run continuously without cycling off, or produce a loud buzzing or chattering noise from the outdoor unit.

• Specs: 2-Pole | 40 FLA (Full Load Amps) | 24V 50/60Hz Control Coil | Definite Purpose Contactor | OEM part# HN52TC040
• OEM vs Generic: This is a genuine Carrier OEM contactor, precision-matched to factory specifications. Generic contactors may use lower-grade contact alloys that pit and fail prematurely under high-cycle loads — especially in hot climates where the system runs frequently.
• Install Difficulty: 2/5 — Always shut off power at the disconnect box before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph all wire connections before removal. The contactor drops directly into the original mounting position with no modifications required.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier TCHC0250HEFMRAF121. Always verify the pole count, amp rating, and coil voltage on your existing contactor's label before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions.