{"product_id":"carrier-c4850c50ak03561-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50AK03561 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C4850C50AK03561\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50AK03561\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V control voltage required to power your thermostat, contactor coil, control board, and all low-voltage safety circuits. When this part 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 fault codes will display because the board itself has lost power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary voltage: 120V | Secondary voltage: 24V | VA rating: 40VA | OEM part number: HT01BD236 | Factory-matched for Carrier packaged unit applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD236 transformer meets Carrier's exact VA rating and insulation class specifications. Generic transformers with undersized VA ratings can overheat under full control-circuit load, causing nuisance trips or premature failure of downstream components like the control board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all low-voltage wiring before disconnecting. Reconnect primary wires first, then secondary.\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 \u003cstrong\u003eCarrier C4850C50AK03561\u003c\/strong\u003e packaged unit. Always confirm your existing transformer's primary voltage, secondary voltage, and VA rating on the unit data plate or wiring diagram before ordering. Need help verifying fitment? Our HVAC parts specialists confirm compatibility before you buy — no guesswork, no returns.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909830332787,"sku":"CARRIE-C4850C50AK03561-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909830365555,"sku":"CARRIE-C4850C50AK03561-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_4dced2c9-827b-4162-992b-5317e3867319.jpg?v=1782899121","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50ak03561-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}