{"product_id":"carrier-c50a702764-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A702764","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD702 for Model C50A702764\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier C50A702764\u003c\/strong\u003e packaged unit. The transformer converts 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When it fails, nothing responds: the thermostat goes blank, the system won't call for heating or cooling, and diagnostics yield no error codes because the board itself has lost power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 output | Factory-matched OEM part number HT01BD702 — direct plug-in replacement with no modifications required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA tolerances, protecting downstream components like the control board and gas valve from voltage fluctuations. Generic alternatives often run undersized VA ratings, causing nuisance tripping and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify voltage is absent before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connect terminals. Label all low-voltage wires before removal and test 24V output at secondary terminals before closing the cabinet.\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 for the \u003cstrong\u003eCarrier C50A702764\u003c\/strong\u003e commercial packaged rooftop unit. Confirm primary voltage (120V) and VA rating on your unit's data plate before ordering. Our parts specialists are available to verify fitment — order with confidence and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909664690547,"sku":"CARRIE-C50A702764-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909664723315,"sku":"CARRIE-C50A702764-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_5bac4012-150a-4621-8cd8-fbf347096013.jpg?v=1782940675","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a702764-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}