{"product_id":"carrier-c4850c50z3055500-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C4850C50Z3055500","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C4850C50Z3055500\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50Z3055500\u003c\/strong\u003e packaged unit. The transformer steps down line voltage (120V) to the 24V AC signal that powers your thermostat, control board, contactor coil, and every other low-voltage control component in the system. When the transformer fails, the entire control circuit goes dead — the thermostat goes blank, the unit refuses to respond to any call for heating or cooling, and no fault codes appear because the board itself has lost power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD236 | Factory-matched for Carrier packaged unit applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by the Carrier control board. Undersized or off-tolerance generic transformers can trip their internal thermal fuse prematurely or fail to sustain voltage under peak load, causing intermittent lockouts and nuisance shutdowns.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter to verify 24V output after installation. Always label or photograph existing wiring before disconnecting the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. 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 specifically for the Carrier \u003cstrong\u003eC4850C50Z3055500\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or original component label before ordering. If your system has experienced a shorted control board or grounded low-voltage wiring, diagnose and correct the root cause before installing a new transformer to prevent repeat failure. Our HVAC parts specialists are available to confirm fitment — order with confidence and get same-day shipping.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909794910579,"sku":"CARRIE-C4850C50Z3055500-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909794943347,"sku":"CARRIE-C4850C50Z3055500-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_e9677fb6-373f-4115-9319-345862dd30c9.jpg?v=1782940132","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z3055500-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}