{"product_id":"carrier-lc748lccsrmpx2600-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V-24V for LC748LCCSRMPX2600","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model LC748LCCSRMPX2600\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eLC748LCCSRMPX2600\u003c\/strong\u003e unit. The control transformer steps down line voltage (120V) to low-voltage 24V AC to power the entire control circuit — including the thermostat, contactor coil, and control board. When the transformer fails, the system goes completely silent: no thermostat response, no fan, no heating or cooling. It is one of the first components to check when nothing in the system responds.\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 for Carrier control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD702 transformer delivers a stable, regulated 24V output within tight tolerances. Off-brand transformers frequently output slightly high or low voltage, causing nuisance lockouts, control board errors, and premature relay failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify voltage is absent before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label or photograph all wiring connections before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In-stock units ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the Carrier model \u003cstrong\u003eLC748LCCSRMPX2600\u003c\/strong\u003e. Always confirm primary voltage (120V) and VA rating on your unit's data plate before ordering. If you are unsure of fitment, our HVAC parts specialists are available to verify compatibility before you purchase — no guesswork, no returns.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909292446067,"sku":"CARRIE-LC748LCCSRMPX2600-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909292478835,"sku":"CARRIE-LC748LCCSRMPX2600-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_996860db-5cb4-474e-9456-04c726305791.jpg?v=1782939945","url":"https:\/\/nationalhvacparts.com\/products\/carrier-lc748lccsrmpx2600-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}