{"product_id":"carrier-c4850c50zz090610-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50ZZ090610 — Ships Today","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C4850C50ZZ090610\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified control circuit transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50ZZ090610\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to 24V to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the system goes completely unresponsive: no thermostat display response, no contactor energizing, and no heating or cooling operation whatsoever. It is often one of the first components to check when a unit appears totally dead with line voltage confirmed at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BD236 | Factory-matched to Carrier C4850C50ZZ090610 electrical specifications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD236 transformer is wound to exact VA and voltage tolerances required by Carrier. Generic transformers may underperform under full control circuit load, causing nuisance lockouts or premature secondary failures in the board or contactor coil.\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, wire nuts or spade terminals, multimeter for voltage verification. Label or photograph all wiring connections before removal. Verify 24V output at secondary terminals after installation before closing the unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. 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\u003eC4850C50ZZ090610\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltage from the data plate or wiring diagram before ordering. Compatible OEM part number: HT01BD236. Need fitment confirmation? Our parts specialists verify compatibility before you order — reach out before purchasing.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909765222771,"sku":"CARRIE-C4850C50ZZ090610-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909765255539,"sku":"CARRIE-C4850C50ZZ090610-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_651b8cfe-ceae-4b7b-ad75-81cf5de4d63d.jpg?v=1782899266","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zz090610-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}