{"product_id":"carrier-c50a402764-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V-24V for C50A402764","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V–24V for Model C50A402764\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) designed specifically for the \u003cstrong\u003eCarrier C50A402764\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to 24V to power the low-voltage control circuit — including the thermostat, contactor coil, and all safety controls. When the transformer fails, nothing in the system responds: the thermostat goes blank, the contactor won't pull in, and the unit sits completely dead despite power being present at the disconnect. A failed transformer is often caused by a short in the low-voltage wiring or a failed component that draws excess current, so always inspect the control circuit before installing a replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 control transformer | Direct OEM replacement, part number HT01BD702 | Factory-matched electrical characteristics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Carrier's exact VA and voltage tolerances. Undersized or off-spec generic transformers can overheat under normal control-circuit loads, leading to repeat failures and potential damage to downstream components including the control board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning work. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before disconnecting and verify 24V output with a multimeter 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. Orders placed before cutoff ship same business day from our national warehouse network.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM fit for the \u003cstrong\u003eCarrier C50A402764\u003c\/strong\u003e commercial packaged unit. Confirm your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909684220275,"sku":"CARRIE-C50A402764-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909684253043,"sku":"CARRIE-C50A402764-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_ff5f8579-422c-4a26-aed8-c8c920fee117.jpg?v=1782939365","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a402764-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}