{"product_id":"carrier-ph3zna030000aa-contactor-1iwybu","title":"OEM Carrier Contactor 24V Coil 2-Pole for PH3ZNA030000AA","description":"\u003ch1\u003eOEM Carrier Contactor 24V Coil 2-Pole for Model PH3ZNA030000AA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement contactor (part number \u003cstrong\u003eHN51KB024\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier PH3ZNA030000AA\u003c\/strong\u003e system. The contactor is a high-voltage relay controlled by the 24V signal from your thermostat or control board. It physically closes the circuit to power the compressor and condenser fan motor each time a cooling call is made. When the contactor fails — due to worn or pitted contact points — the system may hum without starting, fail to energize at all, or remain locked on even after the thermostat is satisfied.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 24V AC coil | 2-pole design | Factory-matched amperage rating | Direct OEM replacement for Carrier part HN51KB024\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM contactor, manufactured to exact factory specifications. Generic aftermarket contactors often use lower-grade contact materials that pit faster under load, leading to premature failure and potential compressor damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — High-voltage component; always disconnect power at the disconnect box and verify voltage is absent with a multimeter before starting. Tools needed: flathead and Phillips screwdrivers, 1\/4\" nut driver, needle-nose pliers, multimeter. 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. In-stock and ships 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 PH3ZNA030000AA\u003c\/strong\u003e. Always verify your existing contactor's coil voltage (24V) and pole configuration against your unit's data plate before ordering. Our team is available to confirm fitment — contact us before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641342677363,"sku":"CARRIE-PH3ZNA030000AA-CONTACTOR-HN51KB024","price":68.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641342710131,"sku":"CARRIE-PH3ZNA030000AA-CONTACTOR-HN51KB024-GEN","price":60.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-contactor-HN51KB024_dd744db2-9713-4d91-bda5-f8232ac483c0.jpg?v=1775022140","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph3zna030000aa-contactor-1iwybu","provider":"National HVAC Parts","version":"1.0","type":"link"}