{"product_id":"carrier-c50a302564-transformer-h301d7","title":"OEM Carrier Transformer 40VA 24V for C50A302564 — HT01BD702","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C50A302564 — Part# HT01BD702\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C50A302564\u003c\/strong\u003e commercial packaged unit. The transformer steps down 120V primary voltage to 24V secondary output, powering the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When it fails, nothing in the system responds: the thermostat goes dark, the unit won't call for heating or cooling, and a multimeter across the secondary terminals will read 0V instead of 24V.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Factory-matched OEM windings | Designed for continuous duty in commercial rooftop and packaged unit applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and impedance specs for the C50A302564 control circuit. Undersized or off-spec generic units can overheat, blow internal fuses, or fail to hold voltage under full control circuit load — leading to nuisance lockouts and repeat service calls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect box before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade terminals. Label all wires before removing the old transformer and verify 0V on primary leads before touching terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM replacement for the \u003cstrong\u003eCarrier C50A302564\u003c\/strong\u003e commercial packaged unit. Cross-reference part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e against your unit's data plate and wiring diagram to confirm VA rating and terminal configuration before ordering. Need fitment help? Our HVAC parts specialists verify compatibility before you buy — reach out via chat or phone.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909702799731,"sku":"CARRIE-C50A302564-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909702832499,"sku":"CARRIE-C50A302564-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_9d654a97-a8cd-46e8-a2bb-e405d641c874.jpg?v=1782942526","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a302564-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}