{"product_id":"carrier-lc748lccsrmyx2600-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for LC748LCCSRMYX2600","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V to 24V for Model LC748LCCSRMYX2600\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eLC748LCCSRMYX2600\u003c\/strong\u003e system. The transformer steps down line voltage (120V) to the 24V signal required by the control board, thermostat, contactor coil, and all low-voltage control circuits. When it fails, nothing responds — the thermostat goes dark, the system won't call for heating or cooling, and no fault codes are produced because the entire control circuit has lost power.\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 to Carrier control circuit specifications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound and tested to Carrier's exact VA rating and insulation class. Undersized generic transformers overheat under typical HVAC load, blow fuses repeatedly, and shorten the life of downstream components like contactors and control boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker and disconnect the furnace\/air handler disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before disconnecting. Verify 24V output with a multimeter before buttoning up the panel.\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 Designed specifically for Carrier model \u003cstrong\u003eLC748LCCSRMYX2600\u003c\/strong\u003e. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. If you're unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you purchase — same-day shipping on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909293134195,"sku":"CARRIE-LC748LCCSRMYX2600-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909293166963,"sku":"CARRIE-LC748LCCSRMYX2600-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_8c49cc8d-76fb-4ea1-84c4-19024ea187c1.jpg?v=1782941719","url":"https:\/\/nationalhvacparts.com\/products\/carrier-lc748lccsrmyx2600-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}