{"product_id":"carrier-ph12na042000aaaa-contactor-1iwxlq","title":"OEM Carrier Contactor 1-Pole 30A 24V for PH12NA042000AAAA","description":"\u003ch1\u003eOEM Carrier Single-Pole Contactor 1-Pole 30A 24V Coil for Model PH12NA042000AAAA (HN51KC024)\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM factory-authorized replacement contactor for the \u003cstrong\u003eCarrier PH12NA042000AAAA\u003c\/strong\u003e heat pump and split-system condenser. The contactor is the primary high-voltage switching relay in your outdoor unit — when the thermostat sends a 24V signal, the contactor closes to deliver line voltage to the compressor and condenser fan motor. A failing contactor causes some of the most common and frustrating HVAC symptoms: the unit won't turn on, runs continuously without shutting off, chatters or buzzes loudly from the electrical panel, or trips the breaker due to burned and pitted contacts welding together.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 1-Pole configuration | 30A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 24 VAC coil voltage | 50\/60 Hz | OEM Part# HN51KC024\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a Factory Authorized Part built to exact Carrier specifications, ensuring proper coil pull-in voltage, contact gap, and arc suppression. Generic aftermarket contactors often use thinner contact material that pits faster under high compressor inrush loads, shortening service life significantly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at both the disconnect and the breaker before opening the control panel. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter. Always photograph existing wiring before disconnecting terminals. Verify 24V coil pull-in after installation with a call from the thermostat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock orders ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Directly fits Carrier model \u003cstrong\u003ePH12NA042000AAAA\u003c\/strong\u003e heat pump condensers. Cross-references include P282-0311, HN51CC024, and 3100-15Q228. Always confirm the part number on your unit's wiring diagram or data plate before ordering. Have a question about fitment? Our HVAC parts specialists verify compatibility before you buy — reach out before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641953309043,"sku":"CARRIE-PH12NA042000AAAA-CONTACTOR-HN51KC024","price":66.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641953341811,"sku":"CARRIE-PH12NA042000AAAA-CONTACTOR-HN51KC024-GEN","price":58.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-contactor-HN51KC024_de4b7316-95db-4dc6-8ba1-ba84c00a2fed.jpg?v=1775021459","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph12na042000aaaa-contactor-1iwxlq","provider":"National HVAC Parts","version":"1.0","type":"link"}