{"product_id":"carrier-c48a802764-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C48A802764","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD702 for Model C48A802764\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C48A802764\u003c\/strong\u003e packaged unit. The transformer converts 120V line voltage down to 24V to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When the transformer fails, the entire control circuit goes dead: the thermostat goes blank, the system won't respond to any call for heating or cooling, and nothing turns on. It is often the first component to check when all other components appear intact but the system is completely unresponsive.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | OEM part number HT01BD702 | Factory-matched output voltage for reliable low-voltage circuit operation\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 frequently deliver inconsistent 24V output, causing nuisance lockouts, contactor chatter, and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Verify 0V at primary terminals before handling. Photograph all wiring connections prior to removal and match wire-for-wire on reinstall.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship 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\u003eC48A802764\u003c\/strong\u003e packaged unit. Confirm your existing transformer's VA rating and primary\/secondary voltages on the unit's data plate before ordering. If you are unsure of fitment, our HVAC parts specialists are available to verify compatibility before you purchase. Order today — in stock and ships same business day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909721051507,"sku":"CARRIE-C48A802764-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909721084275,"sku":"CARRIE-C48A802764-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_86f86ef7-5bc9-42b2-b370-068f50d4ea00.jpg?v=1782940286","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a802764-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}