{"product_id":"carrier-c50a702564-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A702564","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model C50A702564\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eC50A702564\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 coil, gas valve, and control board. When this component fails, the system goes completely silent: the thermostat displays nothing, no relays click, and no heating or cooling cycle initiates. It is often the first component to check when the system appears totally unresponsive.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary voltage: 120V | Secondary voltage: 24V | Factory-matched OEM construction | Class 2 control circuit transformer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers from Carrier are wound to exact VA tolerances, protecting downstream components like control boards and gas valves from voltage fluctuations. Generic transformers often run undersized on VA output, causing nuisance tripping and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 24V output after install). Photograph all wiring connections before disconnecting. Replace any blown 3A fuse on the control board at the same time.\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 NationalHVACParts.com warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for the Carrier \u003cstrong\u003eC50A702564\u003c\/strong\u003e commercial rooftop\/packaged unit. Verify primary and secondary voltage ratings on your unit's data plate before ordering. If you are unsure of fitment, our technical team confirms compatibility before you purchase — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909664756083,"sku":"CARRIE-C50A702564-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909664788851,"sku":"CARRIE-C50A702564-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_868d7dd3-07f0-4850-b879-9050a268c88c.jpg?v=1782940672","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a702564-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}