{"product_id":"carrier-contactor-ha1ajx018000abaa","title":"OEM Carrier Contactor HN51KC024 for Model HA1AJX018000ABAA","description":"\u003cdiv\u003e\n\u003ch1\u003eOEM Carrier Contactor HN51KC024 for Model HA1AJX018000ABAA\u003c\/h1\u003e\n\u003cp\u003eThis OEM Carrier definite purpose contactor (HN51KC024) is the genuine factory replacement for the Carrier HA1AJX018000ABAA 1.5-ton condensing unit. The contactor acts as the electrical switch that energizes the compressor and outdoor fan motor each time the thermostat calls for cooling. When its contacts pit, weld shut, or fail to pull in, you'll see a humming unit, a no-start condition, or rapid short-cycling. This part matches Carrier's original 24V coil voltage, pole count, and amperage rating, so it mounts in the existing bracket and wires to the same line, load, and coil terminals without adapters. Replacement is a moderate job for a trained technician: kill power at the disconnect, document the wiring, move leads individually, and verify clean contact engagement. A genuine OEM contactor delivers the correct ampacity and dependable switching that keeps the compressor protected. In stock and ready to ship. Orders placed before 3PM CST go out the same business day, minimizing downtime. Fitment is guaranteed for the HA1AJX018 series so you can order with confidence.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model HA1AJX018000ABAA.\u003c\/p\u003e\n\u003ch2\u003eShipping\u003c\/h2\u003e\n\u003cp\u003eSame-day shipping before 3 PM CST. 30-day returns on uninstalled parts.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Carrier","offers":[{"title":"Default Title","offer_id":62942697128307,"sku":"carrier-contactor-ha1ajx018000abaa","price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-contactor-carrier-contactor-ha1a_6beb844e-06ba-4faa-ae14-95bdc6b0f419.jpg?v=1781465646","url":"https:\/\/nationalhvacparts.com\/products\/carrier-contactor-ha1ajx018000abaa","provider":"National HVAC Parts","version":"1.0","type":"link"}