{"product_id":"carrier-c48a205063-transformer-h301d7","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C48A205063 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C48A205063\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier C48A205063\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, and control board. When it fails, the result is total loss of system control: the thermostat goes blank, relays won't energize, and the unit will not respond to any call for heating or cooling.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 low-voltage output | Direct OEM replacement for part number HT01BD702\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to exact Carrier factory tolerances, ensuring stable 24V output under full load. Generic transformers often underperform at rated VA, causing intermittent control failures and nuisance lockouts — especially in packaged units with multiple 24V loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Verify 24V output with a multimeter after installation before restoring system power. Photograph all wiring connections prior to removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC48A205063\u003c\/strong\u003e packaged unit. Confirm your existing transformer's primary voltage, secondary voltage, and VA rating on the unit data plate or transformer label before ordering. Our fitment team is available to verify compatibility prior to purchase — in stock and ready to ship today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909756375411,"sku":"CARRIE-C48A205063-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909756408179,"sku":"CARRIE-C48A205063-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_af81f054-565c-4476-ae42-ccd321a2d704.jpg?v=1782899296","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a205063-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}