{"product_id":"carrier-c50a802564-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A802564","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model C50A802564\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part# \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier C50A802564\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coil, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dark — the thermostat loses power, the system won't respond to any calls for heating or cooling, and in many cases the unit appears completely dead despite line voltage being present.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Class 2 transformer | OEM part number HT01BD702 | Factory-matched output tolerance for reliable low-voltage operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to Carrier's exact VA rating and insulation class. Undersized or off-spec generic transformers can overheat under normal load, tripping thermal cutoffs repeatedly and shortening the life of downstream controls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to confirm 24V output after install). Label or photograph all low-voltage wiring before disconnecting. Swap primary and secondary leads carefully — reversing them will damage the board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed by 3PM local time ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the Carrier \u003cstrong\u003eC50A802564\u003c\/strong\u003e commercial rooftop\/packaged unit. Always verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Our fitment specialists are available to confirm compatibility before you purchase — ships same day, so your system is back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909663609203,"sku":"CARRIE-C50A802564-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909663641971,"sku":"CARRIE-C50A802564-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_98c17d24-2d53-4f26-92a7-1a0ed797d1a9.jpg?v=1782940690","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a802564-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}