{"product_id":"carrier-tchc2550hecmray903-contactor-1h3zxi","title":"OEM Carrier 2-Pole Contactor 40A 24V for TCHC2550HECMRAY903","description":"\u003ch1\u003eOEM Carrier 2-Pole Contactor 40A 24V Coil for Model TCHC2550HECMRAY903\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM replacement contactor for the \u003cstrong\u003eCarrier TCHC2550HECMRAY903\u003c\/strong\u003e heat pump system. The contactor is a heavy-duty electromagnetic relay that acts as the high-voltage switch between your thermostat's 24V control signal and the 208–230V power supply feeding the compressor and condenser fan. When the contactor fails, the AC simply won't come on — the thermostat calls for cooling, but nothing responds. You may also notice pitting or burning on the contact points, a humming relay that won't pull in, or a system that short-cycles unpredictably.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 2-Pole (double-pole) | 40A Full Load Amps (FLA) | 24V AC Coil | 50\/60 Hz | 208–230V Switching Voltage | Single Phase | OEM Part# HN52TC040\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier Factory Authorized Part manufactured to exact contact gap, spring tension, and coil pull-in voltage specs. Generic contactors often use thinner contact silver alloy, leading to faster pitting and premature failure — especially under high-cycle heat pump loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at the disconnect box and verify voltage is zero with a multimeter before touching any wiring. Photograph all wire connections before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Typical replacement time is 20–30 minutes for a competent DIYer or technician.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse so your system is back up fast.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the \u003cstrong\u003eCarrier TCHC2550HECMRAY903\u003c\/strong\u003e heat pump condenser. Verify your existing contactor's pole count (2-pole), amperage (40A FLA), and coil voltage (24V) against your unit's data plate before ordering. Cross-reference: HN52TC040 is also noted as equivalent to 310020Q18181CL. Need fitment help? Our HVAC parts specialists confirm compatibility before you buy — reach out via chat or phone.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640270672243,"sku":"CARRIE-TCHC2550HECMRAY903-CONTACTOR-HN52TC040","price":62.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640270705011,"sku":"CARRIE-TCHC2550HECMRAY903-CONTACTOR-HN52TC040-GEN","price":55.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-contactor-HN52TC040_a182c670-a9fd-42a8-8002-a4ec5ed839be.jpg?v=1775015678","url":"https:\/\/nationalhvacparts.com\/products\/carrier-tchc2550hecmray903-contactor-1h3zxi","provider":"National HVAC Parts","version":"1.0","type":"link"}