{"product_id":"carrier-c4850c50zg055200-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50ZG055200 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C4850C50ZG055200\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50ZG055200\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, control board, contactor coil, and every other low-voltage component in the system. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to any call for heating or cooling, and no safety lockouts can even engage. It is often the first component to check when a system appears completely unresponsive.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA output | Primary: 120V AC | Secondary: 24V AC | Class 2 rating | Replaces OEM part number HT01BD236\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to exact Carrier factory tolerances, ensuring stable 24V output under full VA load. Generic transformers frequently under-deliver on VA capacity, causing voltage sag that triggers nuisance lockouts and premature control board failure.\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, multimeter, wire nuts or spade connectors. Photograph and label all wiring before disconnecting. 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 against defects. In-stock units ship same business day when ordered before 3PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed and verified for the Carrier \u003cstrong\u003eC4850C50ZG055200\u003c\/strong\u003e packaged unit. Always confirm your existing transformer's primary voltage, secondary voltage, and VA rating on the unit data plate or original part label before ordering. Our HVAC 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":62909779444083,"sku":"CARRIE-C4850C50ZG055200-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909779476851,"sku":"CARRIE-C4850C50ZG055200-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_ef3060c5-96be-4bd5-b928-7b26b08c7a95.jpg?v=1782939049","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zg055200-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}