{"product_id":"carrier-ca16na04900gbaaa-contactor-1iwxlq","title":"OEM Carrier 40A Contactor 2-Pole 24V Coil for CA16NA04900GBAAA","description":"\u003ch1\u003eOEM Carrier 2-Pole Contactor 24V Coil for Model CA16NA04900GBAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement contactor (part number \u003cstrong\u003eHN51KC024\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier CA16NA04900GBAAA\u003c\/strong\u003e split-system air conditioner. The contactor is the high-voltage relay that receives a 24V signal from your thermostat and closes the circuit to send line voltage to the compressor and condenser fan motor. When the contactor fails — due to worn or pitted contacts, a stuck plunger, or a burned coil — your outdoor unit will fail to start entirely, hum without running, or run continuously without shutting off.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 2-pole configuration | 24V AC coil voltage | 30–40A contact rating | Direct OEM replacement for part number HN51KC024 | Factory-matched electrical tolerances\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM contactors use silver-alloy contact tips rated for thousands of switching cycles. Generic aftermarket units often use lower-grade contacts that pit and weld shut faster, leading to compressor burnout or a system that won't shut off — a costly repeat repair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at both the disconnect box and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, 1\/4\" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before removing the old contactor. Line voltage terminals remain energized until the disconnect is fully open.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In-stock and ships same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed and factory-specified for the Carrier \u003cstrong\u003eCA16NA04900GBAAA\u003c\/strong\u003e 4-ton, 16 SEER split-system condenser. Verify coil voltage and pole configuration on your unit's data plate before ordering. If you're unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you purchase. Order today and receive fast, reliable shipping directly to your door.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909647389043,"sku":"CARRIE-CA16NA04900GBAAA-CONTACTOR-HN51KC024","price":31.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909647421811,"sku":"CARRIE-CA16NA04900GBAAA-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_94e4b248-7a2d-42d9-9c22-863c31b4b631.jpg?v=1782898897","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ca16na04900gbaaa-contactor-1iwxlq","provider":"National HVAC Parts","version":"1.0","type":"link"}