{"product_id":"carrier-c48a404064-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V to 24V for C48A404064 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C48A404064\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified control transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C48A404064\u003c\/strong\u003e packaged unit. The transformer steps line voltage (120V) down to 24V AC to power the entire control circuit — including the thermostat, contactor coil, and control board. When this part fails, your system will appear completely dead: the thermostat goes blank, nothing responds to a call for cooling or heating, and no components energize. It is often the first part to check when a system shows zero control-circuit activity.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA output | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD702 | Factory-matched for Carrier C48A404064 packaged units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound and rated to exact factory specifications. Generic transformers often carry lower VA ratings or inferior insulation, risking premature burnout — especially under high-demand control circuits with multiple 24V loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label all wire connections before removing the old transformer. Always verify 24V output with a multimeter before reassembling 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 Engineered specifically for the Carrier \u003cstrong\u003eC48A404064\u003c\/strong\u003e packaged unit. Confirm 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 verify compatibility before you buy — order with confidence and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909738353011,"sku":"CARRIE-C48A404064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909738385779,"sku":"CARRIE-C48A404064-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_59200dfb-92fc-4238-bd65-2ca23f387eae.jpg?v=1782939227","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a404064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}