{"product_id":"carrier-c50a402564-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A402564","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD702 for Model C50A402564\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement control transformer for the \u003cstrong\u003eCarrier C50A402564\u003c\/strong\u003e commercial packaged unit. The transformer steps down line voltage from 120V to 24V to power the entire low-voltage control circuit — including the thermostat, contactor coils, and control board. When it fails, absolutely nothing responds: the thermostat goes blank, the system won't energize, and no call for heating or cooling is answered. If you've ruled out a blown fuse and your 24V circuit is dead, this transformer is the most likely culprit.\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 to Carrier C50A402564 control circuit requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by the factory control board. Undersized or off-tolerance generic units can overload quickly under full control-circuit demand, leading to repeat failures and potential board damage.\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 spade terminals. Confirm primary and secondary voltages with a meter after installation before restoring full power.\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 warehouse stock.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC50A402564\u003c\/strong\u003e commercial packaged unit. Always verify the 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 before you purchase — no guesswork required. \u003cstrong\u003eOrder now and ship today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909684580723,"sku":"CARRIE-C50A402564-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909684613491,"sku":"CARRIE-C50A402564-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_3d1c7ff9-4eaf-45f3-b2e1-eee2667657b1.jpg?v=1782940496","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a402564-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}