{"product_id":"carrier-c4850c48zn070500-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C48ZN070500 — Ships Today","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C4850C48ZN070500\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-replacement control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C48ZN070500\u003c\/strong\u003e packaged unit. The transformer steps line voltage (120V) down to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, gas valve, and all safety controls. When the transformer fails, nothing in the control system responds: the thermostat goes blank, the unit won't energize, and no error codes are produced because the board itself has no power. A failed transformer is often caused by a short or overload in the 24V circuit, so always inspect low-voltage wiring before installing a replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary: 120V AC | Secondary: 24V AC | VA Rating: 40VA | OEM Part Number: HT01BD236 | Replaces factory-installed transformer on Carrier C4850C48ZN070500\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine Carrier OEM transformer, wound to factory VA and voltage tolerances. Generic transformers often run off-spec under load, causing nuisance lockouts or premature burnout of the control board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before touching any wiring. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Confirm 120V primary and 24V secondary output with a multimeter after installation before re-energizing the full system.\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 warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC4850C48ZN070500\u003c\/strong\u003e packaged unit. Verify your unit's control voltage requirements and transformer mounting configuration against your data plate before ordering. Our fitment specialists are available to confirm compatibility prior to purchase — don't guess on control circuit components.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909851599219,"sku":"CARRIE-C4850C48ZN070500-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909851631987,"sku":"CARRIE-C4850C48ZN070500-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_299f867b-4ca6-4a11-ba96-0e00f75d01dc.jpg?v=1782938844","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c48zn070500-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}