{"product_id":"carrier-c4850c50z6090610-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C4850C50Z6090610 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C4850C50Z6090610\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50Z6090610\u003c\/strong\u003e packaged unit. The control transformer steps down line voltage from 120V to 24V AC to power the low-voltage control circuit — including your thermostat, contactor coil, and all control board logic. When the transformer fails, the entire control circuit goes dead: the thermostat goes blank, the system will not respond to any calls for heating or cooling, and nothing powers on despite line voltage being present at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD236 | Factory-matched windings for correct voltage regulation under load\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage specifications for the Carrier control circuit. Undersized or off-tolerance generic transformers can cause nuisance tripping of the control fuse, board brownouts, and premature contactor coil failure — making OEM the smart long-term choice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all low-voltage wiring before removing the old transformer. Verify 24V output at secondary terminals before reassembling the panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. 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 specifically for the Carrier \u003cstrong\u003eC4850C50Z6090610\u003c\/strong\u003e packaged unit. Always confirm your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Our parts specialists are available to verify fitment — order with confidence and get back up and running today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909786653043,"sku":"CARRIE-C4850C50Z6090610-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909786685811,"sku":"CARRIE-C4850C50Z6090610-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_51907365-5afa-4a5f-9330-f2a75c72a426.jpg?v=1782940142","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z6090610-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}