{"product_id":"carrier-c4850c50z6105610-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50Z6105610 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C4850C50Z6105610\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50Z6105610\u003c\/strong\u003e packaged unit. The control transformer steps down line voltage from 120V to the 24V required by the control circuit, powering your thermostat, contactor coil, and all low-voltage safety controls. When this transformer fails, the entire control circuit goes dead — the thermostat displays nothing, the system won't respond to any call for heating or cooling, and you may measure 0V at the secondary terminals. A failed transformer is often caused by a shorted control wire, a stuck contactor coil, or a faulty board drawing excess current; always inspect the control circuit before replacing.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V | OEM part number HT01BD236 | Factory-matched winding and mounting configuration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to exact factory VA and voltage specifications. Undersized or off-tolerance generic transformers overheat under normal control circuit loads, leading to repeat failures and potential control board damage.\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, multimeter, wire nuts or spade terminals. Label all wires before disconnecting. Verify 0V at secondary before declaring transformer failed — always check for a downstream short first.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC4850C50Z6105610\u003c\/strong\u003e packaged unit. Confirm primary voltage (120V) and VA rating (40VA) on your unit's data plate before ordering. Our parts team is available to verify fitment — order with confidence and get your system running today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909786554739,"sku":"CARRIE-C4850C50Z6105610-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909786587507,"sku":"CARRIE-C4850C50Z6105610-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_a5871322-376a-4382-b82b-491cbd3382b0.jpg?v=1782939031","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z6105610-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}