{"product_id":"carrier-c4850c50aw02051-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50AW02051 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model C4850C50AW02051\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50AW02051\u003c\/strong\u003e packaged unit. The transformer steps down line voltage (120V) to the 24V signal required by the control board, thermostat, and all low-voltage control circuit components. When this transformer fails, the entire control circuit goes dark — the thermostat display may go blank, the system will not respond to any calls for heating or cooling, and you may measure 0V on the secondary side with a multimeter. A failed transformer is often the first component to check when nothing in the system responds.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BD236 | Factory-matched for Carrier C4850C50AW02051 packaged units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer meets Carrier's exact VA rating and insulation class specifications. Generic transformers with lower VA ratings can overheat under full control-circuit load, causing repeated failures and potential damage to the control board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label all low-voltage wires before disconnecting. Verify 0V at primary terminals before touching any wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eC4850C50AW02051\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering to ensure a proper fit. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — in stock and ready to ship today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909824401779,"sku":"CARRIE-C4850C50AW02051-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909824434547,"sku":"CARRIE-C4850C50AW02051-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_76ec16a9-41b9-48c5-b5eb-b486193a0903.jpg?v=1782938890","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50aw02051-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}