{"product_id":"carrier-c50a603064-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A603064","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD702 for Model C50A603064\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C50A603064\u003c\/strong\u003e commercial rooftop unit. The transformer steps down 120V line voltage to the 24V signal that powers your thermostat, control board, contactor coils, and all low-voltage control circuits. When it fails, the entire control circuit goes dark — the thermostat loses power, nothing responds, and the unit will not start under any call for heating or cooling. A failed transformer is often misdiagnosed as a bad thermostat or control board, so always verify 24V output at the secondary terminals before replacing other components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA output rating | Primary: 120V | Secondary: 24V | Factory-matched impedance and thermal overload protection for Carrier commercial rooftop applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit uses factory-spec wire gauge and core lamination, ensuring consistent 24V output under full load. Generic transformers frequently under-deliver voltage under load, causing intermittent lockouts and erratic control board behavior.\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. Verify 24V at secondary terminals after installation before closing the unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier C50A603064\u003c\/strong\u003e commercial packaged rooftop unit. Confirm your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. Our fitment specialists are available to verify compatibility prior to purchase — same-day shipping available on all in-stock OEM parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909665673587,"sku":"CARRIE-C50A603064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909665706355,"sku":"CARRIE-C50A603064-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_64ddaa9e-0bcb-4876-a0cb-a517e447e396.jpg?v=1782940662","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a603064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}