{"product_id":"carrier-c48a602064-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C48A602064","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C48A602064\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C48A602064\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to the 24V signal used by your thermostat, control board, contactor coil, and all low-voltage control circuits. When the transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system will not respond to any call for heating or cooling, and no components will energize. A failed transformer is often mistaken for a thermostat or control board fault, so always confirm 24V output at the secondary terminals before replacing more expensive components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BD702 | Compact, direct-fit design for Carrier C48A602064 packaged unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to factory specifications, ensuring the correct VA rating and voltage tolerances. Undersized or off-spec generic transformers can overheat, trip their internal fuse, and cause intermittent control failures that are difficult to diagnose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flat-head and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label or photograph all low-voltage wiring before disconnecting. Confirm 120V input with a meter before energizing the new unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eC48A602064\u003c\/strong\u003e packaged unit. Cross-reference OEM part number HT01BD702 on your unit's wiring diagram label before ordering. If you need fitment verification, our HVAC parts specialists are available to confirm compatibility before you purchase — same-day shipping on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909725049203,"sku":"CARRIE-C48A602064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909725081971,"sku":"CARRIE-C48A602064-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_35cc29b4-4ca7-46ee-94e8-e012bb30cb31.jpg?v=1782940248","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a602064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}