{"product_id":"carrier-c48a406051-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C48A406051 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C48A406051\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C48A406051\u003c\/strong\u003e packaged unit. The transformer converts 120V line voltage down to the 24V AC signal required to power the control board, thermostat circuit, and all low-voltage safety controls. When this component fails, the entire control circuit goes dark — your thermostat shows no response, contactors won't energize, and the system will not start at all. A failed transformer is often misdiagnosed as a bad control board, making it the smart first replacement to verify.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01BD236 | Factory-matched output for stable low-voltage control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer meets Carrier's exact VA rating and insulation class. Undersized or off-tolerance generic transformers can overheat, trip thermal cutoffs prematurely, and damage downstream control boards — costing far more in follow-up repairs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Verify 0V at primary terminals before touching wiring. Photograph all wire connections before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty included. 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 as a direct OEM replacement for the Carrier \u003cstrong\u003eC48A406051\u003c\/strong\u003e packaged unit. Cross-reference OEM part number HT01BD236 and verify your unit's control circuit voltage requirements on the data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — no guesswork.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909737992563,"sku":"CARRIE-C48A406051-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909738025331,"sku":"CARRIE-C48A406051-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_baa14dc4-5306-4731-acce-9297421c629f.jpg?v=1782899363","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a406051-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}