{"product_id":"carrier-c48a202064-transformer-h301d7","title":"OEM Carrier 40VA 24V Control Circuit Transformer for C48A202064 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C48A202064\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C48A202064\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to the 24V signal required by the control board, thermostat, and all low-voltage system controls. When the transformer fails, the entire control circuit goes dead — your thermostat will show no response, the system won't call for heating or cooling, and nothing will operate despite power being present at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input: 120V AC | Output: 24V AC | VA Rating: 40VA | OEM Part Number: HT01BD702 | Class 2 transformer, factory-matched to Carrier C48A202064 specifications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to exact factory tolerances, ensuring stable 24V output under full load. Generic transformers often drop voltage under peak demand, causing nuisance lockouts and intermittent control board faults that are difficult to diagnose.\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, needle-nose pliers, multimeter (to confirm 24V output after install). Label or photograph all low-voltage wiring connections before disconnecting. A blown transformer may indicate a downstream short — always inspect wiring before replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. 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 the Carrier \u003cstrong\u003eC48A202064\u003c\/strong\u003e packaged unit. Verify your existing transformer's input\/output voltage and VA rating against your unit's data plate before ordering. If your control fuse repeatedly blows, inspect low-voltage wiring for shorts prior to installing the new transformer. Our team is available to confirm fitment — order today and receive same-day shipping.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909762142579,"sku":"CARRIE-C48A202064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909762175347,"sku":"CARRIE-C48A202064-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_2ba2199e-fb4f-4471-ac1b-ccc6b24f934b.jpg?v=1782899461","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a202064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}