{"product_id":"carrier-c48a302064-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V to 24V Control Transformer for C48A302064 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C48A302064\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C48A302064\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V used by your thermostat, control board, contactor coil, and all other low-voltage control circuit components. When this transformer fails, the entire control circuit goes dead — your thermostat goes blank, the system won't respond to any commands, and nothing turns on. It is often the first component to check when a system is completely unresponsive despite the disconnect being powered.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA capacity | 120V primary input | 24V secondary output | Class 2 rated | Direct OEM replacement for part number HT01BD702\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound and insulated to Carrier's exact factory specifications, ensuring proper VA capacity and thermal protection. Undersized or off-brand transformers can overheat, blow internal fuses, or fail to supply adequate current to multi-stage systems.\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 beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Use your multimeter to confirm 0V at the transformer terminals before touching any wiring. Photograph existing wiring connections before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed by 3PM local time ship same business day from our HVAC parts warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for the Carrier \u003cstrong\u003eC48A302064\u003c\/strong\u003e packaged unit. Always verify your existing transformer's VA rating and primary\/secondary voltages against your unit's wiring diagram before ordering. If you have questions about fitment, our parts specialists can confirm compatibility before you buy — same-day shipping available on all in-stock OEM transformers.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909754311027,"sku":"CARRIE-C48A302064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909754343795,"sku":"CARRIE-C48A302064-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_6ab5d417-884f-4bc3-b4b4-c875845b4c13.jpg?v=1782938794","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a302064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}