{"product_id":"carrier-c4850c48zn075610-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C48ZN075610 — Ships Today","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C4850C48ZN075610\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C48ZN075610\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to the 24V AC signal that powers the entire control circuit — including the thermostat, contactor coil, gas valve, and control board. When this transformer fails, absolutely nothing in the control system responds: the thermostat goes dark, the system won't call for heating or cooling, and no outputs are energized. It is often the first component to check when a unit appears completely unresponsive despite having line power.\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 impedance and thermal protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers include integrated thermal overload protection and are wound to exact VA specifications, preventing nuisance trips and premature burnout caused by undersized generic units that run hot under full control-circuit load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect box and verify zero voltage with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade terminals. Always label or photograph existing wiring before disconnecting the old transformer.\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 and factory-specified for the Carrier \u003cstrong\u003eC4850C48ZN075610\u003c\/strong\u003e packaged unit. Confirm your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or old component label 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":62909850517875,"sku":"CARRIE-C4850C48ZN075610-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909850550643,"sku":"CARRIE-C4850C48ZN075610-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_c1893ca6-ca99-4182-8489-82f614e6be1f.jpg?v=1782938849","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c48zn075610-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}