{"product_id":"carrier-c4850c50aw02551-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50AW02551 — Ships Today","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V–24V for Model C4850C50AW02551\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50AW02551\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V AC signal that powers your entire control circuit — including the thermostat, contactor coil, gas valve, and safety switches. When this transformer fails, absolutely nothing responds: the thermostat goes blank, the system won't call for heating or cooling, and the unit sits completely silent. It is often the first component to suspect when a unit appears completely dead despite confirmed line voltage at the disconnect.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 120V AC | Output 24V AC | 40VA rating | OEM part number HT01BD236 | Factory-matched for Carrier C4850C50AW02551 packaged systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound and encapsulated to Carrier's exact VA rating and insulation class. Generic transformers often run undersized VA ratings that sag under full control-circuit load, causing nuisance lockouts and premature failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Verify 24V output after installation before closing the cabinet. Always confirm primary wiring polarity matches the original.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In-stock and ships the same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eC4850C50AW02551\u003c\/strong\u003e packaged unit. Always verify the OEM part number HT01BD236 against your unit's wiring diagram or data plate before ordering. Our HVAC parts specialists are available to confirm fitment — order today and get it shipped out before cutoff.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909823680883,"sku":"CARRIE-C4850C50AW02551-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909823713651,"sku":"CARRIE-C4850C50AW02551-TRANSFORMER-HT01BD236-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BD236_9fa42813-5012-4eac-95d7-844e7151c939.jpg?v=1782938895","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50aw02551-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}