{"product_id":"carrier-c48a206064-transformer-h301d7","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C48A206064 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD702 for Model C48A206064\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C48A206064\u003c\/strong\u003e packaged unit. The control transformer is the heartbeat of your system's low-voltage circuit — it steps down 120V line voltage to the 24V signal voltage that powers your thermostat, contactor coil, and control board. When this transformer fails, nothing works: the thermostat goes dark, the system won't respond to any call for heating or cooling, and you may detect a burnt smell near the control panel. It is often the first component to inspect when diagnosing a completely unresponsive unit.\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 transformer meets Carrier's exact VA rating and insulation class. Generic transformers frequently undersell VA capacity, causing overheating and premature failure — especially under high-demand loads from multiple control accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit at the disconnect before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all wire connections before removal. Verify 24V output 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 against defects. Ships same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eC48A206064\u003c\/strong\u003e packaged unit. Always verify your existing transformer's VA rating, primary voltage, and secondary voltage on the unit's data plate or wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — order with confidence and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909756211571,"sku":"CARRIE-C48A206064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909756244339,"sku":"CARRIE-C48A206064-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_c459ed9a-1f65-4639-bbac-3b421878fe3b.jpg?v=1782899303","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a206064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}