{"product_id":"carrier-lc750lccmray601-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for LC750LCCMRAY601","description":"\u003ch1\u003eOEM Carrier Transformer 40VA for Model LC750LCCMRAY601\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eLC750LCCMRAY601\u003c\/strong\u003e unit. The control transformer steps line voltage (120V) down to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, gas valve, and all safety controls. When the transformer fails, absolutely nothing in the system responds: the thermostat goes blank, the blower won't energize, and the unit sits completely silent. A failed transformer is often the result of a short in the 24V control circuit, so always check for downstream wiring faults before installing the replacement.\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 voltage tolerance for reliable control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound and potted to Carrier's exact specifications, ensuring stable 24V output under full control-circuit load. Generic transformers may sag under load, causing intermittent lockouts, nuisance trips, or contactor chatter that is difficult to diagnose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and confirm voltage is absent before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before removal. After installation, verify 24V output at the secondary terminals before restoring load connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for Carrier model \u003cstrong\u003eLC750LCCMRAY601\u003c\/strong\u003e. Always verify the VA rating and primary\/secondary voltages on your existing transformer's label before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you purchase — reach out before placing your order and we'll confirm the correct fit.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909290578291,"sku":"CARRIE-LC750LCCMRAY601-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909290611059,"sku":"CARRIE-LC750LCCMRAY601-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_017bc667-98f0-4bbb-a3d6-ca62ebb01c71.jpg?v=1782941729","url":"https:\/\/nationalhvacparts.com\/products\/carrier-lc750lccmray601-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}