{"product_id":"carrier-lc750lccmrapx600-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for LC750LCCMRAPX600","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model LC750LCCMRAPX600\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier LC750LCCMRAPX600\u003c\/strong\u003e. The transformer steps down 120V line voltage to the 24V signal required to power your thermostat, control board, and all low-voltage control circuit components. When this transformer fails, the entire control circuit goes dark — your thermostat will appear completely dead, the system will not respond to any call for heating or cooling, and no error codes will be displayed because the board itself has no power to operate.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary voltage: 120V | Secondary voltage: 24V | OEM part number HT01BD702 | Factory-matched output for Carrier control systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers like this HT01BD702 are wound to exact VA and voltage tolerances for Carrier systems. Undersized or off-tolerance generic units can cause erratic board behavior, nuisance tripping of fuses, or premature control board failure — making OEM the only reliable choice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify voltage is off before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Note wire colors and terminal labels before disconnecting. A 3-amp fuse is commonly installed in series — inspect and replace if blown.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. 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 and factory-specified for the \u003cstrong\u003eCarrier LC750LCCMRAPX600\u003c\/strong\u003e. Always verify the 120V primary and 24V secondary voltage requirements on your unit's data plate before ordering to ensure correct fitment. Have questions about compatibility? Our HVAC parts specialists confirm fitment before you buy — contact us before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909290840435,"sku":"CARRIE-LC750LCCMRAPX600-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909290873203,"sku":"CARRIE-LC750LCCMRAPX600-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_2040f1f3-becf-487f-8c8c-3adc4efba6f3.jpg?v=1782941724","url":"https:\/\/nationalhvacparts.com\/products\/carrier-lc750lccmrapx600-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}