{"product_id":"carrier-c48a406064-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C48A406064","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C48A406064\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier C48A406064\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal used by the thermostat, control board, contactor coil, and all low-voltage safety circuits. When it fails, the entire control system goes dark — the thermostat loses power, the unit won't respond to any call for heating or cooling, and no fault codes are displayed because the board itself has no power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary: 120V AC | Secondary: 24V AC | 40VA rated | OEM part number HT01BD702 | Factory-matched for Carrier C48A406064 packaged systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage specifications. Undersized or off-tolerance generic transformers can overload under peak demand, blow the control fuse, or fail to hold the contactor coil closed — leaving you with an intermittent or repeat-failure diagnosis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter to verify 24V output after installation. Label or photograph all wire connections before removing the old unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Pulled from authorized Carrier distributor 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\u003eC48A406064\u003c\/strong\u003e packaged rooftop\/ground-mount unit. Verify your existing transformer's primary voltage (120V), secondary voltage (24V), and VA rating on your unit's data plate or wiring diagram before ordering. Our HVAC parts team is available to confirm fitment prior to purchase — order today for same-day shipping.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909736518003,"sku":"CARRIE-C48A406064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909736550771,"sku":"CARRIE-C48A406064-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_b4b0d123-5afd-44aa-9fb9-9785193b189b.jpg?v=1782940154","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a406064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}