{"product_id":"carrier-c50a403552-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A403552","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model C50A403552\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier C50A403552\u003c\/strong\u003e commercial packaged unit. The transformer steps down line voltage from 120V to 24V AC to power the control board, thermostat, and all low-voltage components throughout the system. When it fails, nothing in the control circuit responds — the thermostat goes blank, the system refuses to start, and the unit appears completely dead despite line power being present. A failed transformer is often confirmed by measuring 0V on the secondary terminals with a multimeter.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD236 | Factory-matched output voltage and VA capacity for full control circuit compatibility\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 Carrier's control boards. Undersized or off-tolerance generic transformers can cause nuisance lockouts, board damage, and premature contactor coil failure due to voltage sag under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, and wire nuts or spade connectors. Label or photograph all wiring connections before removal. Confirm 24V output on the new transformer before closing the cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eC50A403552\u003c\/strong\u003e commercial rooftop\/packaged unit. Verify primary voltage (120V) and VA rating on your unit's wiring diagram or data plate before ordering. Our parts specialists are available to confirm fitment — reach out before you order if you have any questions. \u003cstrong\u003eIn stock and ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909683597683,"sku":"CARRIE-C50A403552-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909683630451,"sku":"CARRIE-C50A403552-TRANSFORMER-HT01BD236-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-HT01BD236_9372e4d1-8b0d-42bb-8c94-cf543e617337.jpg?v=1782940520","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a403552-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}