{"product_id":"carrier-ph12na042000acaa-contactor-1iwxlq","title":"OEM Carrier Contactor 24V Coil 2-Pole for PH12NA042000ACAA","description":"\u003ch1\u003eOEM Carrier Contactor 24V Coil 2-Pole for Model PH12NA042000ACAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement contactor (part number \u003cstrong\u003eHN51KC024\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier PH12NA042000ACAA\u003c\/strong\u003e heat pump system. The contactor is the high-voltage relay that the thermostat's 24V control signal energizes to send line voltage to the compressor and condenser fan motor. When the contactor fails — whether from pitted contacts, a burned coil, or welded terminals — your system will either refuse to start entirely, run continuously without shutting off, or fail to deliver cooling and heating on demand.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 24V AC coil voltage | 2-pole configuration | Factory OEM replacement for Carrier HN51KC024 | Rated for R-410A system electrical loads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier contactor built to exact factory specifications. OEM contacts resist pitting longer than generic equivalents and the coil is wound to precise 24V tolerances — critical for reliable thermostat-to-contactor signal response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Always disconnect power at the disconnect box and verify zero voltage with a multimeter before touching any terminals. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring before removal. Line-voltage terminals require careful torquing — loose connections cause arcing and premature failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed by our daily cutoff ship the same business day from our stocked 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 PH12NA042000ACAA\u003c\/strong\u003e heat pump. Confirm your existing contactor's coil voltage (24V) and pole count (2-pole) against your unit's wiring diagram and data plate before ordering. Our fitment team is available to verify compatibility before you purchase — don't hesitate to reach out.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641951867251,"sku":"CARRIE-PH12NA042000ACAA-CONTACTOR-HN51KC024","price":68.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641951900019,"sku":"CARRIE-PH12NA042000ACAA-CONTACTOR-HN51KC024-GEN","price":60.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-contactor-HN51KC024_bcebd00a-c57e-4d2e-b64f-fcd0baa5148a.jpg?v=1775022101","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph12na042000acaa-contactor-1iwxlq","provider":"National HVAC Parts","version":"1.0","type":"link"}