{"product_id":"carrier-c50a503551-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A503551","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model C50A503551\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier C50A503551\u003c\/strong\u003e commercial rooftop unit. The transformer converts 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coils, and all low-voltage control components. When this part fails, the entire control circuit goes dark — the thermostat loses power, the system will not respond to calls for heating or cooling, and nothing works at all despite the unit receiving line voltage.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | Replaces OEM part number HT01BD236 | Factory-matched output for reliable low-voltage circuit performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer wound to exact VA and voltage tolerances. Generic transformers may be undersized in VA rating, causing overheating, nuisance tripping of the built-in thermal fuse, or premature control board failure from unstable voltage output.\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, wire nuts or spade connectors. Verify 24V output at secondary terminals with a multimeter after installation before restoring power to the full system.\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 specifically for the \u003cstrong\u003eCarrier C50A503551\u003c\/strong\u003e commercial rooftop packaged unit. Always verify the VA rating and primary\/secondary voltages against your unit's wiring diagram and data plate before ordering. Not sure it fits? Our HVAC parts specialists will confirm fitment before you buy — contact us today and get your system back online fast with same-day shipping.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909671735667,"sku":"CARRIE-C50A503551-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909671768435,"sku":"CARRIE-C50A503551-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_3ca09d6e-a0f3-40b7-8b94-558922a945d0.jpg?v=1782940604","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a503551-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}