{"product_id":"carrier-c4850c50zn070600-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50ZN070600 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model C4850C50ZN070600\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50ZN070600\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, contactor coil, gas valve, and all other low-voltage control components. When this transformer fails — due to a shorted control wire, failed component, or age — absolutely nothing in the control circuit will respond: no heat, no cooling, no fan, and a blank or unresponsive thermostat. It is often the first component to check when the system appears completely dead despite the breaker being on.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 output | Factory-matched to OEM control board requirements | OEM Part No. HT01BD236\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound and rated to Carrier's exact specifications. Generic aftermarket transformers often underrate VA capacity, leading to premature failure under normal control circuit loads — especially in multi-stage or multi-zone systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the breaker and disconnect switch before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all low-voltage wiring connections before removal. Verify 24V output with a multimeter after installation before restoring full system power.\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 the direct OEM replacement transformer for the Carrier \u003cstrong\u003eC4850C50ZN070600\u003c\/strong\u003e packaged unit. Always verify your existing transformer's VA rating and primary\/secondary voltages against your unit's data plate before ordering. Our parts specialists are available to confirm fitment — contact us before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909770203507,"sku":"CARRIE-C4850C50ZN070600-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909770236275,"sku":"CARRIE-C4850C50ZN070600-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_068edcec-7a7a-4178-a7af-87fe68f68f24.jpg?v=1782899250","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zn070600-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}