{"product_id":"carrier-c4850c50zn030200-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50ZN030200 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C4850C50ZN030200 (HT01BD236)\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50ZN030200\u003c\/strong\u003e packaged unit. The transformer steps down line voltage (120V) to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and gas valve. When it fails, nothing in the system responds: the thermostat goes blank, the unit refuses to start, and no error codes are displayed because the control board itself has lost power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input: 120V AC | Output: 24V AC | Rating: 40VA | OEM Part Number: HT01BD236 | Factory-matched for Carrier C4850C50ZN030200 packaged systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer wound to exact VA and voltage tolerances. Generic transformers often underperform at rated load, causing erratic control behavior, nuisance lockouts, or premature secondary-side failures in multi-zone systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before disconnecting. Verify 24V output with a multimeter after installation before closing the panel.\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 HVAC parts warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the \u003cstrong\u003eCarrier C4850C50ZN030200\u003c\/strong\u003e packaged gas\/electric unit. Always verify your unit's control circuit voltage and VA requirement on the data plate or wiring diagram before ordering. Our parts specialists are available to confirm fitment — contact us before you buy if you have any doubts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909776494963,"sku":"CARRIE-C4850C50ZN030200-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909776527731,"sku":"CARRIE-C4850C50ZN030200-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_20445063-6a24-4737-9314-81f617d17813.jpg?v=1782939057","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zn030200-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}