{"product_id":"carrier-c48a402564-transformer-h301d7","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C48A402564 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD702 for Model C48A402564\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer for the \u003cstrong\u003eCarrier C48A402564\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, contactor coil, and control board. When this component fails, the entire control circuit goes dark — the thermostat loses power, nothing responds, and the system will not run in any mode. If your Carrier C48A402564 is completely unresponsive and you've ruled out a tripped breaker, a failed transformer is the most likely culprit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01BD702 | Factory-matched output for full control circuit compatibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM Carrier transformer is wound to exact VA and voltage specifications for the C48A402564. Generic transformers often carry ±15% VA tolerance, which can cause intermittent control failures, nuisance tripping of the secondary fuse, or premature contactor coil burnout.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before disconnecting. Confirm 24V output with your multimeter before restoring the control circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Direct OEM replacement for Carrier model \u003cstrong\u003eC48A402564\u003c\/strong\u003e packaged units. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. Our HVAC parts specialists are available to confirm fitment prior to purchase — order with confidence and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909743661427,"sku":"CARRIE-C48A402564-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909743694195,"sku":"CARRIE-C48A402564-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_0e27ed2a-e318-4787-9c40-a84224181f41.jpg?v=1782899350","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a402564-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}