{"product_id":"carrier-c4850c50aw05161-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50AW05161 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C4850C50AW05161\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50AW05161\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal used by your thermostat, contactor coil, and control board. When this component fails, the entire control circuit goes dead — your thermostat will appear unresponsive, the system won't call for heating or cooling, and no error codes will display because the board itself has no power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Single-phase | Designed to OEM tolerance for Carrier packaged equipment | Part number HT01BD236\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and insulated to Carrier's exact VA and thermal specs. Undersized or off-tolerance generic units can overheat under high-demand control circuits, causing repeated nuisance failures and potential board damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 24V output after installation). Label or photograph all wire connections before removing the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier C4850C50AW05161\u003c\/strong\u003e packaged unit. Verify the OEM part number HT01BD236 against your unit's wiring diagram or data plate before ordering. If you have any fitment questions, our HVAC parts specialists will confirm compatibility before you purchase — same-day response guaranteed.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909815226739,"sku":"CARRIE-C4850C50AW05161-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909815259507,"sku":"CARRIE-C4850C50AW05161-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_9a59a60c-da48-4172-88d1-b21adfa4eb05.jpg?v=1782938932","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50aw05161-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}