{"product_id":"carrier-c48a602764-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C48A602764","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD702 for Model C48A602764\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier C48A602764\u003c\/strong\u003e packaged unit. Its sole but critical job is to step down line voltage (120V) to the 24V signal voltage that powers your thermostat, contactor coil, and control board. When this transformer fails, the entire low-voltage control circuit goes dark — the thermostat goes blank, the system stops responding to calls for heating or cooling, and nothing works. It is often the first component to check when a unit is completely unresponsive despite confirmed line voltage at the disconnect.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V | OEM part number HT01BD702 | Factory-matched to Carrier C48A602764 electrical specifications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer wound to exact VA and voltage tolerances. Generic transformers can run hot, sag under load, and trip thermal cutouts prematurely — causing intermittent no-start conditions that are difficult to diagnose.\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, wire nuts. Label or photograph all wiring connections at the primary and secondary terminals before removal. Confirm 24V output at secondary terminals after installation before reassembling the cabinet.\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 specifically for the Carrier \u003cstrong\u003eC48A602764\u003c\/strong\u003e packaged unit. Verify primary voltage (120V) and VA rating on your unit's data plate before ordering. If you're unsure of fitment, our parts team is happy to confirm compatibility before you buy — just reach out before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909724819827,"sku":"CARRIE-C48A602764-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909724852595,"sku":"CARRIE-C48A602764-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_a7eebdca-d1cb-43a3-a5d9-32dd6ded6d42.jpg?v=1782940253","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a602764-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}