{"product_id":"carrier-c50a702064-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A702064","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model C50A702064\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 C50A702064\u003c\/strong\u003e commercial packaged unit. The transformer converts 120V line voltage to the 24V signal voltage that powers your thermostat, control board, and all low-voltage control circuits. When this component fails, the entire control circuit loses power — resulting in a completely unresponsive system, a blank thermostat display, or a unit that refuses to heat or cool despite the disconnect being on.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | Factory-matched OEM design | Compatible with standard 24V control circuit wiring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers like the HT01BD702 are wound and rated to exact Carrier factory specifications, ensuring stable 24V output under full control circuit load. Generic substitutes often run undervoltage at peak demand, causing intermittent lockouts and contactor chatter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Always verify 0V at primary terminals before handling. Label all low-voltage wires before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC50A702064\u003c\/strong\u003e commercial rooftop\/packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit's data plate or wiring diagram before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you purchase — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909664854387,"sku":"CARRIE-C50A702064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909664887155,"sku":"CARRIE-C50A702064-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_5343e90d-f72e-43c5-9251-5d31ed587b88.jpg?v=1782940669","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a702064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}