{"product_id":"carrier-c50a402751-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A402751","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C50A402751\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part # \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C50A402751\u003c\/strong\u003e commercial rooftop unit. The transformer steps down line voltage from 120V to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, the entire control circuit goes dead: the thermostat loses power, the unit will not respond to any call for heating or cooling, and nothing turns on. A failed transformer is often misdiagnosed as a bad thermostat or control board, making correct identification critical before replacing more expensive parts.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01BD236 | Factory-matched output tolerance for stable low-voltage control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage specifications for the C50A402751 control circuit. Undersized or off-tolerance generic units can cause nuisance tripping, erratic thermostat behavior, or premature contactor coil 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, wire stripper, multimeter. Verify 24V output after installation before restoring control circuit. Always confirm primary voltage matches your supply before wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC50A402751\u003c\/strong\u003e commercial rooftop packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — order with confidence and get back up and running fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909685629299,"sku":"CARRIE-C50A402751-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909685662067,"sku":"CARRIE-C50A402751-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_a7e20b0c-5459-4721-80c9-ede5841c5ac1.jpg?v=1782940499","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a402751-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}