{"product_id":"carrier-c4850c50zn105610-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50ZN105610 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model C4850C50ZN105610\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50ZN105610\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to 24V to power the entire low-voltage control circuit — including the thermostat, control board, contactor coil, and safety switches. When this transformer fails, the entire system goes dark: the thermostat loses power, no components respond, and the unit will not attempt to start. A failed transformer is often mistakenly diagnosed as a bad control board, so always verify 24V output at the secondary terminals before replacing more expensive components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 120V AC | Output 24V AC | 40VA rating | OEM part number HT01BD236 | Factory-matched for Carrier C4850C50ZN105610 packaged units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to exact factory VA and voltage tolerances. Generic transformers frequently under-perform rated VA, causing voltage sag under load 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 beginning. Tools needed: multimeter, flat-head and Phillips screwdrivers, wire nuts or spade connectors. Test for 24V output across secondary terminals after installation before closing the cabinet. Label or photograph all control wiring prior to disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our warehouse when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eC4850C50ZN105610\u003c\/strong\u003e packaged unit. Verify your unit's control circuit voltage and VA requirements on the data plate before ordering. If you are unsure of fitment, our HVAC parts specialists can confirm compatibility before your order is placed — same-day shipping available on all in-stock OEM parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909769449843,"sku":"CARRIE-C4850C50ZN105610-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909769482611,"sku":"CARRIE-C4850C50ZN105610-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_67fa2340-8db1-4255-85c3-739c0ee7eb55.jpg?v=1782899257","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zn105610-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}