{"product_id":"carrier-c48a502551-contactor-1k1tl0","title":"OEM Carrier 40A Contactor 2-Pole 24V Coil for C48A502551","description":"\u003ch1\u003eOEM Carrier 2-Pole Contactor for Model C48A502551 Packaged Unit\u003c\/h1\u003e\u003cp\u003eThis OEM replacement contactor is the factory-specified high-voltage relay for the \u003cstrong\u003eCarrier C48A502551\u003c\/strong\u003e packaged unit. The contactor acts as the primary switch that closes the high-voltage circuit to the compressor and condenser fan motor when the thermostat calls for cooling. A failed contactor is one of the most common reasons an air conditioning system will not turn on — symptoms include a clicking or buzzing sound with no compressor start, burned or pitted contact points, or a coil that fails to pull in despite receiving the 24V control signal. Replaces OEM part numbers \u003cstrong\u003eHN53CB115\u003c\/strong\u003e and \u003cstrong\u003eHN53HF122\u003c\/strong\u003e.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 2-pole configuration | 24V AC coil voltage | 30–40A load rating | Factory-matched contact material and coil pull-in voltage for reliable switching under full load conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM contactor uses factory-grade silver-alloy contact points rated to manufacturer specifications. Generic contactors frequently use lower-grade contact material that pits faster under repeated switching, shortening service life — especially in high-cycle cooling climates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Always disconnect power at the breaker AND disconnect switch before beginning. Tools needed: flathead and Phillips screwdrivers, 1\/4\" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before removal. Verify coil voltage with a multimeter prior to replacement to rule out a control board or transformer fault.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM replacement for the \u003cstrong\u003eCarrier C48A502551\u003c\/strong\u003e packaged unit. Cross-references OEM part numbers HN53CB115 and HN53HF122. Always confirm pole count, amperage rating, and coil voltage against your unit's data plate and existing contactor label before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909735928179,"sku":"CARRIE-C48A502551-CONTACTOR-HN53CB115","price":40.8,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909735960947,"sku":"CARRIE-C48A502551-CONTACTOR-HN53CB115-GEN","price":30.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-contactor-2pole-HN53CB115_0e5a129c-0aac-4de2-a570-308ec850d3a6.jpg?v=1782898849","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a502551-contactor-1k1tl0","provider":"National HVAC Parts","version":"1.0","type":"link"}