{"product_id":"carrier-c48a203064-transformer-h301d7","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C48A203064 — Ships Today","description":"\u003ch1\u003eOEM Carrier Control Circuit Transformer 40VA for Model C48A203064\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier C48A203064\u003c\/strong\u003e packaged unit. The transformer converts 120V line voltage to the 24V signal required to power your control board, thermostat, contactor coil, and all low-voltage control circuits. When this component fails, the entire control system goes dark — the thermostat becomes unresponsive, the unit will not start, and no error codes can be generated because the board itself has lost power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM Part Number: HT01BD702 | Factory-matched impedance and thermal protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM Carrier transformer is wound to exact factory VA ratings, ensuring the 24V secondary circuit can handle full control-board and contactor coil loads simultaneously. Undersized or off-tolerance generic transformers can overheat, trip thermal cutoffs repeatedly, or fail prematurely under multi-zone thermostat loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Photograph all wiring connections before removal. Verify input and output voltages with a multimeter after installation before closing the panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC48A203064\u003c\/strong\u003e packaged unit. Always verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — reach out before you order if you have any questions. \u003cstrong\u003eIn stock and ready to ship today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909760602483,"sku":"CARRIE-C48A203064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909760635251,"sku":"CARRIE-C48A203064-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_38ed3c4b-3ed2-4f51-8c29-363cac4662f0.jpg?v=1782899273","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a203064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}