{"product_id":"carrier-hb1bjx042000aaaa-contactor-1iwxlq","title":"OEM Carrier 40A Contactor 2-Pole 24V Coil for HB1BJX042000AAAA","description":"\u003ch1\u003eOEM Carrier 2-Pole Contactor 24V Coil for Model HB1BJX042000AAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM replacement contactor (part number \u003cstrong\u003eHN51KC024\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier HB1BJX042000AAAA\u003c\/strong\u003e split-system unit. The contactor is a high-voltage relay that bridges 240V line power to the compressor and condenser fan motor when the thermostat calls for cooling. When the contactor fails — through pitted contacts, a burned coil, or contacts that weld shut — the system will either refuse to start entirely, fail to shut off, or trip the circuit breaker repeatedly. Replacing the contactor is one of the most common and cost-effective HVAC repairs available.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 2-pole configuration | 24V AC coil voltage | 240V load side | 30–40A contact rating | Direct OEM replacement part number HN51KC024\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM contactors use silver-alloy contact tips rated to factory arc-interruption specs. Generic contactors frequently use lower-grade alloys that pit faster under the high inrush current of compressor startup, leading to premature failure within one to two seasons.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power at the disconnect box and confirm voltage is zero before proceeding. Tools needed: flathead and Phillips screwdrivers, 1\/4\" nut driver, needle-nose pliers, non-contact voltage tester. Photograph all wiring before removing the old contactor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before cutoff ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e This contactor is the direct OEM replacement for \u003cstrong\u003eCarrier model HB1BJX042000AAAA\u003c\/strong\u003e. Always verify your unit's data plate for coil voltage and amperage rating before ordering to ensure proper fitment. Not sure if this is the right part? Our HVAC parts specialists verify fitment before you buy — reach out before placing your order and we'll confirm compatibility at no charge.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909348086131,"sku":"CARRIE-HB1BJX042000AAAA-CONTACTOR-HN51KC024","price":31.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909348118899,"sku":"CARRIE-HB1BJX042000AAAA-CONTACTOR-HN51KC024-GEN","price":23.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-contactor-2pole-HN51KC024_65fcda62-4757-4199-8950-d35f1d9c92fc.jpg?v=1782898984","url":"https:\/\/nationalhvacparts.com\/products\/carrier-hb1bjx042000aaaa-contactor-1iwxlq","provider":"National HVAC Parts","version":"1.0","type":"link"}