{"product_id":"carrier-c4850c50zg030900-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Transformer for C4850C50ZG030900 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V to 24V for Model C4850C50ZG030900\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eC4850C50ZG030900\u003c\/strong\u003e packaged unit. The transformer is the backbone of your system's low-voltage control circuit — it steps down line voltage (120V) to the 24V signal used by the thermostat, contactor coil, gas valve, and control board. When it fails, the entire control circuit goes dead: the thermostat goes blank, the system refuses to respond to any call for heating or cooling, and nothing works despite line voltage being present at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA capacity | Primary: 120V | Secondary: 24V | OEM part number HT01BD236 | Factory-matched for Carrier C4850C50ZG030900 packaged units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and rated to exact factory specifications, ensuring stable 24V output under full control circuit load. Undersized or off-tolerance generic transformers can brown out the control circuit, causing nuisance lockouts, contactor chatter, and premature control board 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, needle-nose pliers, multimeter (to confirm 24V output after install). Label all low-voltage wires before disconnecting from old transformer terminals.\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 as a direct OEM replacement for Carrier model \u003cstrong\u003eC4850C50ZG030900\u003c\/strong\u003e packaged units. Always confirm primary and secondary voltage ratings on your unit's data plate before ordering. Our fitment team is available to verify compatibility before you complete your purchase — get your system back online fast with same-day shipping.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909782196595,"sku":"CARRIE-C4850C50ZG030900-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909782229363,"sku":"CARRIE-C4850C50ZG030900-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_a6462b32-2c59-4ef6-9d9c-fc605ed8370c.jpg?v=1782899420","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zg030900-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}