{"product_id":"carrier-c48a802064-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C48A802064 — HT01BD702","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C48A802064\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-replacement control transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C48A802064\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 it fails, the entire low-voltage control circuit goes dead — the thermostat goes blank, the system won't respond to any call for heating or cooling, and nothing turns on. It is one of the first components to check when a system appears completely unresponsive despite having line power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 120V AC | Output 24V AC | 40VA rating | OEM part number HT01BD702 | Factory-matched primary and secondary windings for precise voltage regulation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine Carrier OEM transformer, wound to exact factory VA and voltage specifications. Generic transformers often underrate their VA capacity, causing overheating and premature failure — especially when multiple 24V accessories (humidifier, zone board, UV light) share the same circuit.\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. Confirm primary voltage at the transformer terminals before condemning the part. Always cap or tape wire ends during replacement to prevent accidental shorts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC48A802064\u003c\/strong\u003e packaged unit. Verify your unit's control voltage requirements and existing transformer VA rating on the data plate before ordering. If you are unsure of fitment, our parts team is available to confirm compatibility before you buy. In stock and ready to ship today — get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909721444723,"sku":"CARRIE-C48A802064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909721477491,"sku":"CARRIE-C48A802064-TRANSFORMER-HT01BD702-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-HT01BD702_eb3b6c75-58cb-45e8-b305-19b44e744df5.jpg?v=1782940281","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a802064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}