{"product_id":"carrier-lc748lccsrmyx2601-transformer-h301d7","title":"OEM Carrier Transformer 40VA 24V for LC748LCCSRMYX2601","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 24V Control Circuit for Model LC748LCCSRMYX2601\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier LC748LCCSRMYX2601\u003c\/strong\u003e. The transformer steps down line voltage (typically 120V) to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, the entire system goes silent: the thermostat goes blank, the contactor won't energize, and no heating or cooling function will respond. A failed transformer is often the first diagnosis when \u003cem\u003enothing\u003c\/em\u003e in the system appears to work.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Factory-matched OEM part number HT01BD702 | Designed for low-voltage HVAC control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit meets Carrier's exact VA rating and insulation class specifications. Generic transformers frequently underrate their VA capacity, causing thermal overload trips and premature failure — especially on systems with multiple 24V accessories or zone controllers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always shut off power at the disconnect and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper, needle-nose pliers. Verify secondary voltage output (should read ~24–28V AC) after installation before closing the cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before 3PM ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as the direct OEM replacement for \u003cstrong\u003eCarrier model LC748LCCSRMYX2601\u003c\/strong\u003e. Cross-reference part number HT01BD702 against your unit's wiring diagram or data plate to confirm fitment. If you are unsure, our HVAC parts specialists verify compatibility before your order ships — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909291594099,"sku":"CARRIE-LC748LCCSRMYX2601-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909291626867,"sku":"CARRIE-LC748LCCSRMYX2601-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_9d5b06fb-3bc1-46f1-a6ff-bc36df19f7cd.jpg?v=1782942623","url":"https:\/\/nationalhvacparts.com\/products\/carrier-lc748lccsrmyx2601-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}