{"product_id":"carrier-c4850c50aw03051-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50AW03051 — Ships Today","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model C4850C50AW03051\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50AW03051\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When the transformer fails, the result is typically a completely unresponsive system: blank thermostat display, no response to calls for heating or cooling, and no contactor engagement. A failed transformer is often caused by a shorted control wire, a seized contactor coil, or a wiring fault that draws excessive current through the secondary winding.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 120V AC | Output 24V AC | 40VA rating | OEM part number HT01BD236 | Factory-matched impedance and thermal protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound and rated to Carrier's exact specifications, ensuring proper VA headroom for all connected low-voltage loads. Undersized or off-spec generic transformers can overheat and fail prematurely, especially in systems with multiple low-voltage accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Always check for shorted low-voltage wiring before installing the new transformer to prevent repeat failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC4850C50AW03051\u003c\/strong\u003e packaged unit. Confirm input\/output voltage and VA rating on your existing transformer's label before ordering. If you are unsure of fitment, our HVAC parts team is available to verify compatibility before you purchase. Order today and your part ships the same business day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909822435699,"sku":"CARRIE-C4850C50AW03051-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909822468467,"sku":"CARRIE-C4850C50AW03051-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_d844bb64-833e-4ae5-a69b-674ef77699a7.jpg?v=1782899132","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50aw03051-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}