{"product_id":"carrier-c48a402051-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C48A402051 | HT01BD236 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C48A402051\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-replacement control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C48A402051\u003c\/strong\u003e packaged unit. The transformer steps down line voltage (120V) to the 24V low-voltage signal that powers your thermostat, contactor coil, and all control circuit components. When this part fails, the entire control system goes dark — the thermostat shows no response, the system will not heat or cool, and you may blow the low-voltage fuse repeatedly. It is one of the first components to check in a completely unresponsive unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA output rating | Primary: 120VAC | Secondary: 24VAC | OEM part number HT01BD236 | Factory-matched to Carrier C48A402051 control circuit requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM transformer is wound and insulated to Carrier's exact VA rating and thermal specs. Undersized or off-brand transformers can overheat, trip internal breakers, or fail prematurely — especially under the simultaneous load of multiple control accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all wire connections before removal. Confirm secondary output reads 24–28VAC after install before closing the unit.\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\u003eC48A402051\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit's data plate or wiring diagram before ordering. Our fitment team is available to confirm compatibility prior to purchase. Order today and receive same-day shipping on all in-stock parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909747298675,"sku":"CARRIE-C48A402051-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909747331443,"sku":"CARRIE-C48A402051-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_d5b588ba-c950-4085-91c4-51ec4fba0001.jpg?v=1782939185","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a402051-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}