{"product_id":"carrier-c48a605064-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C48A605064","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V Control Circuit for Model C48A605064\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eC48A605064\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to 24V AC, powering the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, nothing in the system responds: the thermostat goes blank, the unit won't energize, and no call for heating or cooling will be answered. It is often the first component to inspect when a system goes completely unresponsive.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD702 | Factory-matched for Carrier C48A605064 packaged units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to exact factory VA and voltage tolerances. Generic transformers can run under-rated VA, causing overheating, blown fuses, or nuisance trips on the secondary circuit — problems that are difficult to diagnose and often damage downstream components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect box and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, wire strippers, multimeter. Label or photograph all low-voltage wiring before disconnecting terminals. Reconnect leads to matching color or terminal labels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. In stock and ships same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eC48A605064\u003c\/strong\u003e packaged unit. Verify your unit's data plate shows a 120V primary \/ 24V secondary, 40VA control transformer before ordering. Not sure about fitment? Our HVAC parts specialists confirm compatibility before your order ships — just reach out.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909724328307,"sku":"CARRIE-C48A605064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909724361075,"sku":"CARRIE-C48A605064-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_96fdfd97-0c46-4596-9b9d-3d96a5cab5f7.jpg?v=1782940260","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a605064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}