{"product_id":"carrier-c48a902764-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C48A902764","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD702 for Model C48A902764\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C48A902764\u003c\/strong\u003e packaged unit. The transformer converts 120V line voltage to the 24V AC signal that powers your thermostat, control board, and all low-voltage switching circuits. When it fails, the entire control circuit goes dark — the thermostat becomes unresponsive, nothing calls for heating or cooling, and the system won't start at all. A blown transformer is often the cause when a system appears completely dead with no error codes.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Factory-matched output tolerances | Integrated thermal overload protection on select units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers like this HT01BD702 are wound and rated to Carrier's exact VA load requirements. Generic alternatives are frequently undersized, causing nuisance trips or premature burnout when the control circuit draws peak current during staging.\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, wire stripper, multimeter, needle-nose pliers. Always verify 0V at terminals before touching wiring. Photograph existing wiring connections prior to removal.\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 Designed for use in the Carrier \u003cstrong\u003eC48A902764\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit's data plate before ordering. Not sure if this part fits your system? Our HVAC parts specialists confirm fitment before you buy — contact us today and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909719806323,"sku":"CARRIE-C48A902764-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909719839091,"sku":"CARRIE-C48A902764-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_7ead7e64-146d-42e3-ba40-559a163887ab.jpg?v=1782940306","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a902764-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}