{"product_id":"carrier-c4850c48zg040200-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C4850C48ZG040200","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C4850C48ZG040200\u003c\/h1\u003e\u003cp\u003eThis OEM replacement control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified unit for the \u003cstrong\u003eCarrier C4850C48ZG040200\u003c\/strong\u003e packaged HVAC system. The transformer steps down line voltage from 120V to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When it fails, nothing works: the thermostat goes dark, the system won't respond to calls for heating or cooling, and you may find a blown fuse on the control board caused by a shorted secondary winding.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V AC | OEM Part Number: HT01BD236 | Factory-matched output voltage and VA capacity for full circuit protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD236 transformer meets Carrier's exact VA rating and thermal cutoff specifications. Undersized generic transformers can overheat under normal control circuit loads, leading to 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 before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter to verify 24V output after installation. Label or photograph existing wiring before disconnecting. Primary and secondary terminals are clearly marked.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock and ships 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\u003eC4850C48ZG040200\u003c\/strong\u003e packaged unit. Verify primary input voltage and VA rating on your unit's data plate before ordering to confirm correct fitment. Our team is available to verify compatibility before you buy — don't hesitate to reach out. Order today for same-day shipping.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909866639731,"sku":"CARRIE-C4850C48ZG040200-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909866672499,"sku":"CARRIE-C4850C48ZG040200-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_de5debda-0376-4ae6-8e00-7deef34eab84.jpg?v=1782940087","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c48zg040200-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}