{"product_id":"carrier-ha1bjx030000acaa-contactor-1iwybu","title":"OEM Carrier Contactor 2-Pole 24V Coil for HA1BJX030000ACAA","description":"\u003ch1\u003eOEM Carrier Contactor 2-Pole 24V Coil for Model HA1BJX030000ACAA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM replacement contactor (part number \u003cstrong\u003eHN51KB024\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier HA1BJX030000ACAA\u003c\/strong\u003e heat pump or split-system unit. The contactor is a high-voltage relay that acts as the main power switch between your electrical panel and the compressor and condenser fan motor. When the thermostat calls for cooling or heating, the 24V control circuit energizes the contactor coil, closing the high-voltage contacts and powering the outdoor unit. A failed or pitted contactor is one of the most common causes of an outdoor unit that simply won't start — often accompanied by a buzzing or chattering noise — even though the thermostat is calling for operation.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 2-pole configuration | 24V AC coil voltage | Rated for residential single-phase compressor loads | Factory-matched contact material and coil resistance to OEM specification (part \u003cstrong\u003eHN51KB024\u003c\/strong\u003e)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM contactors use factory-grade silver-alloy contact tips rated to exact amperage thresholds. Generic contactors frequently use lower-grade contacts that pit and arc faster under compressor inrush current, leading to repeat failures within one to two seasons.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, 1\/4\" nut driver, needle-nose pliers, and a multimeter to verify zero voltage before touching terminals. Photograph all wiring connections 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 the daily cut-off ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for the \u003cstrong\u003eCarrier HA1BJX030000ACAA\u003c\/strong\u003e. Always verify coil voltage, pole count, and amperage rating against your unit's data plate and existing contactor before ordering. Our fitment team is available to confirm compatibility prior to purchase — same-day shipping means you're back up and running fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909363585395,"sku":"CARRIE-HA1BJX030000ACAA-CONTACTOR-HN51KB024","price":31.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909363618163,"sku":"CARRIE-HA1BJX030000ACAA-CONTACTOR-HN51KB024-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-HN51KB024_cd83314d-9f8c-4b58-8f2e-830b598ca22b.jpg?v=1782904777","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ha1bjx030000acaa-contactor-1iwybu","provider":"National HVAC Parts","version":"1.0","type":"link"}