{"product_id":"carrier-c4850c50ak03051-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50AK03051 — Ships Today","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V–24V for Model C4850C50AK03051\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50AK03051\u003c\/strong\u003e packaged unit. The transformer steps high-voltage 120V line power down to the 24V control voltage that powers your thermostat, contactor coil, control board, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to any call for heating or cooling, and no components will energize. It is often the first part to check when a system appears completely unresponsive despite confirmed line voltage at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 120VAC | Output 24VAC | 40VA rated | OEM part number HT01BD236 | Factory-matched primary and secondary winding tolerances\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Carrier's exact VA and voltage tolerances, ensuring stable 24V output under full control-circuit load. Generic transformers can sag under load, causing intermittent lockouts and nuisance tripping of low-voltage fuses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter to verify 24V output after installation. Label and photograph all low-voltage wiring connections before disconnecting the old transformer.\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 specifically for the Carrier \u003cstrong\u003eC4850C50AK03051\u003c\/strong\u003e packaged unit. Verify input voltage (120V) and VA rating on your existing transformer's label before ordering. If your unit runs on 208\/240V primary input, do not use this transformer — contact our parts team to confirm fitment. Orders placed before 3 PM local time ship same business day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909832003955,"sku":"CARRIE-C4850C50AK03051-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909832036723,"sku":"CARRIE-C4850C50AK03051-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_dc6480b3-570d-4a35-b4c8-8abf51ffdec4.jpg?v=1782938868","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50ak03051-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}