{"product_id":"carrier-c50a604064-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V-24V for C50A604064","description":"\u003ch1\u003eOEM Carrier 40VA Control Circuit Transformer for Model C50A604064\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier C50A604064\u003c\/strong\u003e commercial packaged rooftop unit. The transformer converts 120V primary voltage to the 24V secondary voltage required to power the entire low-voltage control circuit — including the thermostat, contactor coils, and control board. When this component fails, the system goes completely unresponsive: no thermostat communication, no staging, no heat or cooling — nothing works at all.\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 control circuit operation\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 Carrier C50A604064 control board. Undersized or off-tolerance generic units can cause nuisance tripping, erratic thermostat behavior, or premature control board failure.\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 connectors. Verify 24V output after installation before restoring full system power. Always label or photograph existing wiring prior to removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC50A604064\u003c\/strong\u003e commercial rooftop packaged unit. Confirm your existing transformer's VA rating and primary\/secondary voltages from the unit data plate before ordering to ensure a correct fit. Our HVAC parts specialists are available to verify compatibility before you purchase — order with confidence and get back up and running fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909665247603,"sku":"CARRIE-C50A604064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909665280371,"sku":"CARRIE-C50A604064-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_fee3dc9e-18b4-4b95-88e3-aaf9c96bf0f9.jpg?v=1782939389","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a604064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}