OEM Carrier 2-Pole Contactor 40A 24V Coil — HN52TC040 for Model TCHC2550HECMRSY501

This is the OEM factory-specified contactor for the Carrier TCHC2550HECMRSY501 heat pump system. The contactor is the high-voltage relay that closes the circuit to power the compressor and condenser fan motor every time your thermostat calls for cooling or heating. When the contactor fails — due to worn contacts, a burned coil, or pitting from repeated electrical arcing — the system will fail to energize even though the thermostat is calling. Common symptoms include the outdoor unit not turning on, a humming sound from the disconnect area with no compressor start, or visible contact pitting and carbon scoring on the terminals.

• Specs: 2-Pole | 40A FLA (Full Load Amps) | 24V 50/60Hz coil voltage | OEM part number HN52TC040 | Factory-matched electrical ratings
• OEM vs Generic: This is a genuine Carrier OEM contactor engineered to exact factory tolerances. Generic contactors often use lower-grade contact alloys that pit faster under load cycling, leading to premature failure and potential compressor damage from voltage drop.
• Install difficulty: 2/5 — Always disconnect power at the breaker AND the disconnect block before starting. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring before removing terminals. Discharge any residual voltage before touching contacts.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model TCHC2550HECMRSY501. Verify your existing contactor's pole count, amperage, and coil voltage against your unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment — order with confidence and get back to comfort fast.