{"product_id":"carrier-c50a703564-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A703564","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD702 for Model C50A703564\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified replacement transformer for the \u003cstrong\u003eCarrier C50A703564\u003c\/strong\u003e commercial rooftop unit. The control transformer steps down 120V line voltage to the 24V AC signal used by your thermostat, contactor coils, and control board. When this component fails, the entire control circuit loses power — the result is a completely unresponsive system: no thermostat display, no contactor pull-in, and no staging response. It is one of the first components to inspect when a unit appears totally dead despite confirmed line voltage at the unit.\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 tolerance for reliable low-voltage circuit performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage specifications for the C50A703564 control circuit load. Generic units often underrate VA capacity, causing thermal cutout trips under normal thermostat and accessory loads — leading to repeat failures and unnecessary callbacks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Confirm 0V on primary terminals before touching wiring. Photograph existing wiring connections before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units ship the same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for the \u003cstrong\u003eCarrier C50A703564\u003c\/strong\u003e commercial rooftop packaged unit using part number HT01BD702. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Our parts specialists are available to confirm fitment prior to purchase — order with confidence and get back up and running fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909664264563,"sku":"CARRIE-C50A703564-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909664297331,"sku":"CARRIE-C50A703564-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_f4c569f9-40c5-4741-bcad-f97f5fba82ce.jpg?v=1782940680","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a703564-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}