{"product_id":"carrier-c4850c50aw05051-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50AW05051 — Ships Today","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model C4850C50AW05051\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50AW05051\u003c\/strong\u003e packaged unit. The transformer steps down line voltage (120V) to the 24V signal voltage required to power the control board, thermostat, and all low-voltage system controls. When the transformer fails, the entire control circuit goes dead — the thermostat loses power, the system won't respond to any commands, and no heating or cooling operation is possible. A failed transformer is often caused by a shorted control circuit wire or a faulty component downstream, so always inspect wiring before installing the replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BD236 | Factory-matched electrical specifications for reliable control circuit performance\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 insulation class requirements. Generic transformers frequently underperform under sustained load, leading to premature thermal cutout trips and repeat failures — especially in packaged rooftop applications with high cycling demands.\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. Verify 24V output after installation before restoring full power. Photograph all wiring connections prior to removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed and factory-matched for the Carrier \u003cstrong\u003eC4850C50AW05051\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. Our fitment specialists are available to confirm compatibility — just reach out before you buy. In stock and ready to ship today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909816504691,"sku":"CARRIE-C4850C50AW05051-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909816537459,"sku":"CARRIE-C4850C50AW05051-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_fa046457-d460-4166-bdc1-9da62d066fbd.jpg?v=1782938925","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50aw05051-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}