{"product_id":"carrier-c48a202764-transformer-h301d7","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C48A202764 — Ships Today","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD702 for Model C48A202764\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C48A202764\u003c\/strong\u003e packaged unit. The transformer steps line voltage (120V) down to the 24V signal required by your thermostat, control board, contactor coil, and all low-voltage safety circuits. When the transformer fails, the entire control circuit goes dark — no thermostat response, no contactor pull-in, and no heating or cooling whatsoever. A blown fuse on the secondary side or a visibly burnt transformer body are the most common signs of failure.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V | Class 2 insulation | Chassis-mount design | OEM part number HT01BD702\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Carrier's exact VA rating and insulation class. Generic replacements frequently use undersized windings that overheat under full control-circuit load, causing repeated blown fuses and premature failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect box before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to verify 24V output after install). Label or photograph all low-voltage wiring connections before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before 3 PM ET ship the same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC48A202764\u003c\/strong\u003e packaged unit. Verify primary voltage and VA rating on your unit's data plate before ordering. If your existing transformer shows a different VA rating or dual-primary wiring (120V\/240V), contact our parts team — we verify fitment before you buy so there are no surprises. In stock and ready to ship today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909760668019,"sku":"CARRIE-C48A202764-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909760700787,"sku":"CARRIE-C48A202764-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_4389e683-3c63-4dfe-ba4a-836d2af4e32a.jpg?v=1782899271","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a202764-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}