{"product_id":"carrier-c50a303051-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V-24V for C50A303051","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C50A303051\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C50A303051\u003c\/strong\u003e commercial rooftop unit. The transformer steps down 120V line voltage to the 24V AC signal required to power the entire control circuit — including the thermostat, contactor coil, gas valve, and all safety switches. When this transformer fails, absolutely nothing responds: no fan, no heat, no cooling, and no thermostat communication. A failed transformer is often misdiagnosed as a control board issue, so always verify 24V output at the secondary terminals before replacing more expensive components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary input | 24V AC secondary output | OEM part number HT01BD236 | Factory-matched insulation class and thermal protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and impedance specifications for the C50A303051 control circuit. Generic units may run hot under load, trip thermal cutoffs prematurely, or deliver unstable voltage that causes nuisance lockouts and board damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect box before starting. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade terminals. Verify 0V at primary leads before touching wiring. Photograph all connections before removal.\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 climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC50A303051\u003c\/strong\u003e commercial packaged rooftop unit. Confirm primary voltage on your unit's wiring diagram and data plate before ordering — some configurations may use a 208\/240V primary. Our parts specialists are available to verify fitment before you order. In stock and ready to ship today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909703422323,"sku":"CARRIE-C50A303051-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909703455091,"sku":"CARRIE-C50A303051-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_0f0ddcb4-3c79-4533-8c15-8b2ad06919bb.jpg?v=1782939339","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a303051-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}